HELISYS INC
SC 13D/A, 1998-09-23
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC
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<PAGE>



                                    UNITED STATES
                          SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON, D.C. 20549


                                     SCHEDULE 13D


                      UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                 (AMENDMENT NO. TWO)*

                                    HELISYS, INC.
                                    -------------
                                   (Name of Issuer)

                            COMMON STOCK, $0.001 PAR VALUE
                            ------------------------------
                            (Title of Class of Securities)

                                     423282 10 2
                                     -----------
                                    (CUSIP Number)

          Robert Steinberg Esq., c/o Jeffer, Mangels, Butler & Marmaro LLP,
2121 AVENUE OF THE STARS, 10TH FLOOR, LOS ANGELES, CALIFORNIA  90067, 
                                    (310) 203-8080
   ---------------------------------------------------------------------------
   (Name, Address and Telephone Number of Person Authorized to Receive Notices
                                  and Communications)

                                  SEPTEMBER 14, 1998
               -------------------------------------------------------
               (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), (f) or (g), check the following box  / /.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that Section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


                                       1
<PAGE>



                                   SCHEDULE 13D
<TABLE>
<CAPTION>
- ---------------------                                                                                        ---------------------
CUSIP NO. 423282 10 2
- ---------------------                                                                                        ---------------------
- ----------------------------------------------------------------------------------------------------------------------------------
  <S>     <C> <C>                                                                                                         <C>
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

           REED L. HARMAN
- ----------------------------------------------------------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                                                               (a) /X/
                                                                                                                           
                                                                                                                           (b) / /
- ----------------------------------------------------------------------------------------------------------------------------------
    3      SEC USE ONLY

- ----------------------------------------------------------------------------------------------------------------------------------
    4      SOURCE OF FUNDS*
             PF

- ----------------------------------------------------------------------------------------------------------------------------------
    5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                             / /
           
- ----------------------------------------------------------------------------------------------------------------------------------
    6      CITIZENSHIP OR PLACE OF ORGANIZATION
             U.S.A.

- ----------------------------------------------------------------------------------------------------------------------------------

                7      SOLE VOTING POWER
                           -0-
              --------------------------------------------------------------------------------------------------------------------
  NUMBER OF   
    SHARES      8      SHARED VOTING POWER
 BENEFICIALLY          900,000
    OWNED     --------------------------------------------------------------------------------------------------------------------
     BY
    EACH        9      SOLE DISPOSITIVE POWER
  REPORTING            -0-
   PERSON     --------------------------------------------------------------------------------------------------------------------
    WITH
               10      SHARED DISPOSITIVE POWER
                       900,000
- ----------------------------------------------------------------------------------------------------------------------------------
   11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           900,000

- ----------------------------------------------------------------------------------------------------------------------------------
   12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*                                              / /

- ----------------------------------------------------------------------------------------------------------------------------------
   13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
              17.6%

- ----------------------------------------------------------------------------------------------------------------------------------
   14      TYPE OF REPORTING PERSON*
              IN

- ----------------------------------------------------------------------------------------------------------------------------------
                                       *SEE INSTRUCTIONS BEFORE FILLING OUT

                                       2
<PAGE>




                                                   SCHEDULE 13D


- ---------------------                                                                                        ---------------------
CUSIP NO. 423282 10 2
- ---------------------                                                                                        ---------------------
- ----------------------------------------------------------------------------------------------------------------------------------
  <S>     <C> <C>                                                                                                         <C>
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

           NAN M. HARMAN
- ----------------------------------------------------------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                                                               (a) /X/
                                                                                                                                   
                                                                                                                           (b) / /
- ----------------------------------------------------------------------------------------------------------------------------------
    3      SEC USE ONLY

- ----------------------------------------------------------------------------------------------------------------------------------
    4      SOURCE OF FUNDS*
              PF

- ----------------------------------------------------------------------------------------------------------------------------------
    5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                             / /

- ----------------------------------------------------------------------------------------------------------------------------------
    6      CITIZENSHIP OR PLACE OF ORGANIZATION
              U.S.A.
- ----------------------------------------------------------------------------------------------------------------------------------

                7      SOLE VOTING POWER
                           -0-
              --------------------------------------------------------------------------------------------------------------------
  NUMBER OF   
    SHARES      8      SHARED VOTING POWER
 BENEFICIALLY          900,000
    OWNED     --------------------------------------------------------------------------------------------------------------------
     BY
    EACH        9      SOLE DISPOSITIVE POWER
  REPORTING            -0-
   PERSON     --------------------------------------------------------------------------------------------------------------------
    WITH
               10      SHARED DISPOSITIVE POWER
                       900,000
- ----------------------------------------------------------------------------------------------------------------------------------
   11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           900,000

- ----------------------------------------------------------------------------------------------------------------------------------
   12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*                                              / /

- ----------------------------------------------------------------------------------------------------------------------------------
   13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
              17.6%

- ----------------------------------------------------------------------------------------------------------------------------------
   14      TYPE OF REPORTING PERSON*
              IN

- --------------------------------------------------------------------------------------------------------------------------
                                       *SEE INSTRUCTIONS BEFORE FILLING OUT

                                       3

<PAGE>


                                                   SCHEDULE 13D

- ---------------------                                                                                        ---------------------
CUSIP NO. 423282 10 2
- ---------------------                                                                                        ---------------------
- ----------------------------------------------------------------------------------------------------------------------------------
  <S>     <C> <C>                                                                                                         <C>
    1      NAME OF REPORTING PERSON
           I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

           VISALIA TRUST

- ----------------------------------------------------------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                                                               (a) /X/

                                                                                                                           (b) / /
- ----------------------------------------------------------------------------------------------------------------------------------
    3      SEC USE ONLY

- ----------------------------------------------------------------------------------------------------------------------------------
    4      SOURCE OF FUNDS*
              PF

- ----------------------------------------------------------------------------------------------------------------------------------
    5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                             / /

- ----------------------------------------------------------------------------------------------------------------------------------
    6      CITIZENSHIP OR PLACE OF ORGANIZATION
              CALIFORNIA,  U.S.A.

- ----------------------------------------------------------------------------------------------------------------------------------
                7      SOLE VOTING POWER
                           -0-
              --------------------------------------------------------------------------------------------------------------------
  NUMBER OF   
    SHARES      8      SHARED VOTING POWER
 BENEFICIALLY          900,000
    OWNED     --------------------------------------------------------------------------------------------------------------------
     BY
    EACH        9      SOLE DISPOSITIVE POWER
  REPORTING            -0-
   PERSON     --------------------------------------------------------------------------------------------------------------------
    WITH
               10      SHARED DISPOSITIVE POWER
                       900,000
- ----------------------------------------------------------------------------------------------------------------------------------
   11      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           900,000

- ----------------------------------------------------------------------------------------------------------------------------------
   12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*                                              / /

- ----------------------------------------------------------------------------------------------------------------------------------
   13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
              17.6%

- ----------------------------------------------------------------------------------------------------------------------------------
   14      TYPE OF REPORTING PERSON*
              00

- --------------------------------------------------------------------------------------------------------------------------
                                       *SEE INSTRUCTIONS BEFORE FILLING OUT
</TABLE>

                                       4


<PAGE>

ITEM 1.  SECURITY AND ISSUER

         This statement relates to the Common Stock, par value $0.001 per share
         ("Common Stock"), of Helysis, Inc. a Delaware corporation (the 
         "Company"), consisting of (i) up to 600,000 shares of Common Stock 
         issuable upon conversion of Series A Preferred Stock of the Company, 
         and (ii) 300,000 shares of Common Stock issuable upon exercise of 
         Warrants to purchase an aggregate of 300,000 shares of Common Stock.  
         All of such shares and warrants are held of record by Visalia Trust, 
         a revocable trust of which Reed L. Harman and Nan M. Harman are the 
         co-trustees.

         The Company's principal executive offices are located at 24015 Garnier
         Street, Torrance, California 90505.

ITEM 2.  IDENTITY AND BACKGROUND

         a.  This statement is being filed by Reed L. Harman, Nan M. Harman and
             the Visalia Trust (collectively, the "Reporting Persons").

         b.  1820 Via Visalia, Palos Verdes Estates, California 90274

         c.  Reed L. Harman is a private investor and is president of Southwest
             Investment Partners, a privately held investment company whose 
             address is 1850 Via El Prado, Suite 405, Redondo Beach, California
             90277.  Nan M. Harman is the spouse of Mr. Harman and is not 
             currently employed.

         d.  None of the Reporting Persons has, during the last five years, been
             convicted in a criminal proceeding (excluding traffic violations or
             similar misdemeanors).

         e.  None of the Reporting Persons has been, during the last five years,
             a party to a civil proceeding of a judicial or administrative body
             of competent jurisdiction and as a result of such proceeding was or
             is subject to a judgment, decree or final order enjoining future 
             violations of, or prohibiting or mandating activities subject to, 
             federal or state securities laws or finding any violation with 
             respect to such laws.

         f.  U.S.A.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

         Pursuant to the terms of a Series A Preferred Stock and Warrant 
         Purchase Agreement, dated September 14, 1998 (the "Purchase 
         Agreement"), a copy of which is filed as Exhibit 99.A hereto, Visalia 
         Trust acquired  (i) 24,000 shares of Series A Preferred Stock of the
         Company (which shares are convertible into an aggregate of 600,000 
         shares of Common Stock of the Company, subject to adjustment in the 
         event of certain dilutive issuances), and (ii) Warrants (the 
         "Warrants") to purchase an aggregate of 300,000 shares of Common Stock
         of the Company at an initial exercise price of $.35 per share (subject
         to adjustment in the event of certain dilutive issuances).  The 
         aggregate purchase  price paid by the Visalia Trust for the shares of 
         Series A Preferred Stock and Warrants was $150,000.  The source of the
         funds paid by the Visalia Trust for the Series A Preferred Stock and 
         Warrants was cash held by the Visalia Trust, none of which was borrowed
         or obtained from other sources and all of which was part of the assets
         of the Visalia Trust.

                                       5

<PAGE>

ITEM 4.  PURPOSE OF THE TRANSACTION

         The Reporting Persons acquired the Series A Preferred Stock and the
         Warrants for investment purposes.  Based on the Reporting Persons' 
         ongoing evaluation of the business, prospects, and financial condition 
         of the Company, the market for and price of the Common Stock, other 
         opportunities available to the Reporting Persons, and other future 
         developments, the Reporting Persons reserve the right to change their 
         plans and intentions at any time, as they deem appropriate.  In 
         particular, the Reporting Persons may decide to sell or seek the sale
         of all or part of their present or future beneficial holdings of Common
         Stock, or may decide to acquire additional Common Stock, or securities
         convertible into or exchangeable for Common Stock, either in the open 
         market, in private transactions or by any other permissible means.

         The Stock Subscription Warrant governing the terms of the Warrants,
         includes provisions protecting against certain dilutive events which 
         could result in an increase or decrease in the number of shares of 
         Common Stock issuable upon exercise of the Warrants.  Reference is made
         to Section 2.5 of the Stock Subscription Warrant filed as Exhibit 99.B
         hereto.

         The Restated Certificate of Designation of Rights, Preferences and
         Privileges of Series A Preferred Stock of the Company (the 
         "Certificate of Designation") which sets forth the rights preferences 
         and privileges of the Series A Preferred Stock, includes provisions 
         protecting against certain dilutive events which could result in an 
         increase or decrease in the number of shares of Common Stock issuable 
         upon conversion of the Series A Preferred Stock into Common Stock. 
         Reference is made to Section 3 of the Certificate of Designation filed
         as Exhibit 99.C hereto.

         Pursuant to the provisions of Section 5(a) of the Certificate of
         Designation, except as otherwise required by law or discussed below 
         with respect to the election of directors, the holders of Series A 
         Preferred Stock shall be entitled to vote as a single class with the 
         holders of Common Stock.  Holders of Series A Preferred Stock shall 
         have the number of votes per share equal to:

              (A)  If the average market price of a share of Common Stock (as 
              defined in the Certificate of Designation) is $2.00 per share or 
              greater, the number of shares of Common Stock into which each such
              share of Series A Preferred Stock is convertible at the time of 
              the vote;

              (B)  If the average market price of a share of Common Stock (as
              defined in the Certificate of Designation) is less than $2.00 per
              share but greater than or equal to $1.00 per share, the number of
              shares of Common Stock into which each such share of Series A
              Preferred Stock is convertible at the time of the vote multiplied
              by 2.5; or
       
              (C)  If the average market price of a share of Common Stock (as 
              defined in the Certificate of Designation) is less than $1.00 per
              share, the number of shares of Common Stock into which each such 
              share of Series A Preferred Stock is convertible at the time of 
              the vote multiplied by 5.

                                       6

<PAGE>

         As a result of these voting provisions, as of September 21, 1998,  the
         Reporting Persons had the right to vote the 24,000 shares of Series A
         Preferred Stock beneficially owned by them as if they were the 
         equivalent of 3,000,000 shares of Common Stock. The voting rights 
         granted to the holders of the Series A Preferred Stock could impede the
         acquisition of control of the Company by any other person and the 
         exercise of any control over the Company by the holders of Common 
         Stock.

         Pursuant to the provisions of Section 5(b) of the Certificate of
         Designation, the holders of the outstanding shares of Series A  
         Preferred Stock, voting as a separate class, have the right to elect 
         one member of the Board of Directors of the Company.  In the event that
         240,000 or more shares of Series A Preferred Stock are issued and 
         outstanding, the holders of the Series A Preferred Stock, voting as a
         separate class, shall have the right to elect one additional director.

         Reference is made to the Shareholders' Agreement (the "Shareholders'
         Agreement"), dated September 14, 1998, by and among the Company and 
         certain of its stockholders (including the Visalia Trust), a copy of 
         which is filed as Exhibit 99.D hereto.  Pursuant to Section 2.1 of the 
         Shareholders' Agreement, the holders of the Series A Preferred Stock 
         have agreed that so long as Telantis Venture Partners V, Inc. holds no
         less than 35% of the shares of Series A Preferred Stock originally 
         acquired by it, it shall have the right to designate the Series A 
         Preferred stockholders' director nominee and the Visalia Trust has 
         agreed to vote its shares in favor of such nominee.

         See the information disclosed in Item 6 of this Form 13D which is
         incorporated herein by this reference.

ITEM 5.  INTEREST IN SECURITIES OF THE COMPANY

         a.  Reed L. Harman and Nan M. Harman, as co-trustees of the Visalia 
             Trust, a revocable trust of which Mr. and Mrs. Harman are the 
             co-trustees and joint trustors, beneficially own an aggregate of 
             (i) 24,000 shares of Series A Preferred Stock of the Company which
             is convertible into an aggregate of 600,000 shares of Common Stock
             of the Company, and (ii) 300,000 shares of Common Stock issuable 
             upon exercise of the Warrants.  The 900,000 shares of Common Stock
             beneficially owned by the Reporting Persons constitutes 17.6% of 
             the outstanding shares of Common Stock (assuming (i) 4,109,762  
             shares of Common Stock outstanding, and (ii) exercise or conversion
             of the Reporting Persons' Series A Preferred Stock and Warrants 
             into Common Stock).

         b.  Reed L. Harman and Nan M. Harman, as co-trustees of the Visalia 
             Trust, have shared power to vote and dispose of the  shares of 
             Common Stock of the Company beneficially owned by the Reporting 
             Persons.

         c.  Pursuant to the terms of the Purchase Agreement, Reed L. Harman and
             Nan M. Harman, as co-trustees of the Visalia Trust, acquired (i) 
             24,000 shares of Series A Preferred Stock of the Company (which 
             shares are convertible into an aggregate of 600,000 shares of 
             Common Stock of the Company, subject to adjustment in the event of
             certain dilutive issuances), and (ii) Warrants (the "Warrants") to
             purchase an aggregate of 300,000 shares of Common 

                                       7

<PAGE>

             Stock of the Company at an initial exercise price of $.35 per share
             (subject to adjustment in the event of certain dilutive issuances).
             The aggregate purchase  price paid by the Visalia Trust for the 
             shares of Series A Preferred Stock and Warrants was $150,000.

         d.  Not applicable.

         e.  Not applicable.

ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
         TO SECURITIES OF THE ISSUER.

         Pursuant to Section 7.17 of the Purchase Agreement, in the event that
         the average market price of the Company's Common Stock (as defined in
         the Certificate of Designation) is less than $.50 per share at any 
         time commencing September 15, 1999, the Visalia Trust shall have the 
         right to exchange shares of Series A Preferred Stock for a convertible
         promissory note of the Company in the principal amount equal to the 
         purchase price for such shares plus an annualized return from the date
         of purchase equal 35% plus any accrued dividends.  Such convertible 
         promissory note would bear interest at 10% per annum and be payable 
         quarterly over a two year period commencing six months from the 
         issuance of such note. The note would be convertible into Common Stock
         upon demand of the holder. In the event of the loss of certain 
         intellectual property rights of the Company or the failure of the 
         Company to obtain a line of credit of at least $650,000 by October 31,
         1998, the conversion right may be exercised by the holders of Series A
         Preferred Stock without regard to the average market price of the 
         Company's Common Stock.

         Pursuant to Section 8.6 of the Purchase Agreement, the Company has 
         granted the Reporting Persons (and certain other purchasers of Series A
         Preferred Stock and Warrants) the right to exchange the shares of 
         Series A Preferred Stock and Warrants for any securities of the type to
         be offered by the Company (other than certain issuances to management,
         directors and employees of, and consultants to, the Company).

         Pursuant to Section 3 of the Shareholders' Agreement, the Company has
         granted the Reporting Persons (and certain other purchasers of Series A
         Preferred Stock and Warrants) a preemptive right to acquire its
         proportionate share of any new securities offered by the Company.

         Pursuant to Section 9 of the Purchase Agreement, the Company has 
         agreed, subject to certain conditions, to register the shares of Common
         Stock issuable upon conversion of the Series A Preferred Stock and 
         exercise of the Warrants held by the Visalia Trust under the 
         Securities Act of 1933, as amended.  The Company has also agreed that 
         the Visalia Trust may elect to exchange its registration rights for 
         any superior registration rights that it grants to any other person 
         in the future (see Section 8.2 of the Purchase Agreement).

         Section 7 of the Certificate of Designation requires the approval of a
         majority of the outstanding shares of Series A Preferred Stock in order
         to take certain specified actions including (i) amendment of the 
         Company's Certificate of Incorporation or Bylaws, (ii) capital 
         reorganization of the Company, (iii) redemption of Common Stock (other
         than from employees upon termination of employment), (iv) consolidation
         or merger with or into, or acquisition of substantially all the assets 
         of, any other entity, (iv) sell, lease, convey, encumber or otherwise 
         dispose of all or substantially

                                       8

<PAGE>

         all of the property or business of the Company, (vi) create, authorize
         or issue any additional shares of Common Stock or convertible stock, 
         having a preference or priority as to dividends or assets  superior to
         or on parity with the Series A Preferred Stock, or (vii) pay dividends
         on Common Stock or any other class of stock unless all dividends have 
         been paid or set aside for payment on the Series A Preferred Stock.  
         Notwithstanding the foregoing, the Company may issue up to 96,000 
         shares of a new series of Preferred Stock identical to the Series A 
         Preferred Stock, except that each such share of new Preferred Stock 
         shall be convertible into 12.5 shares of Common Stock (the "New 
         Stock").  The Visalia Trust would have the right to purchase such 
         shares of New Stock in proportion to its holdings of the Series A 
         Preferred Stock bears to the total number of shares of Series A 
         Preferred Stock outstanding (currently, approximately 16.7%)

         Section 4.5 of the Shareholders' Agreement provides certain holders of
         the Series A Preferred Stock, including the Visalia Trust, with a right
         of first refusal on any disposition of securities of the Company by 
         Michael Feygin, an executive officer and director of the Company.  If
         Mr. Feygin wishes to sell any equity security of the Company held by 
         him, he must first offer such securities to such Series A Preferred 
         Stockholders.  As of the date of the Company's most recent proxy 
         statement, Mr. Feygin was the beneficial owner of 1,993,260 shares of 
         Common Stock.  In addition, pursuant to Section 4.4. of the 
         Shareholders' Agreement, Mr. Feygin has agreed to limit his 
         dispositions of equity securities of the Company to the limits imposed
         by Rule 144 of the Rules and Regulations under the Securities Act of 
         1933, as amended, on "affiliates" of the Company, regardless of 
         whether he falls within the meaning of such term.  For the 12 month 
         period commencing September 14, 1998, Mr. Feygin has agreed that he
         will not dispose of shares with an aggregate sales price of more than
         $100,000 or a per share price of less than $1.00.

         See the information disclosed in Item 4 of this Form 13D which is
         incorporated herein by this reference.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS

     Exhibit 99.A   Series A Preferred Stock and Warrant Purchase Agreement

     Exhibit 99.B   Form of Stock Subscription Warrant

     Exhibit 99.C   Restated Certificate of Designation of Rights, Preferences
                    and Privileges of Series A Preferred Stock of the Company

     Exhibit 99.D   Shareholders' Agreement


                                       9

<PAGE>

                                     SIGNATURES


     After reasonable inquiry and to the best of our knowledge and belief, we
certify that the information set forth in this statement is true, complete and
correct.

September 22, 1998

                               /s/ Reed L. Harman
                               ---------------------------------------
                               REED L. HARMAN, individually
                               and as Co-Trustee of
                               the Visalia Trust



                               /s/ Nan M. Harman
                               ---------------------------------------
                               NAN M. HARMAN, individually
                               and as Co-Trustee of
                               the Visalia Trust




<PAGE>

             SERIES A PREFERRED STOCK AND WARRANT PURCHASE AGREEMENT

         THIS SERIES A PREFERRED STOCK AND WARRANT PURCHASE AGREEMENT (this
"Agreement") is made and entered into as of the 14th day of September, 1998, by
and among HELISYS, INC. (the "Company"), a Delaware corporation having offices
at 24015 Garnier Street, Torrance, California 90505 and each of the parties
listed on Schedule 1 hereto (the "Schedule of Purchasers"). The parties listed
on the Schedule of Purchasers are hereinafter referred to collectively as the
"Purchasers").

         WHEREAS, the Company desires to issue and sell, and the Purchasers 
desire to purchase, certain securities of the Company;

     NOW, THEREFORE, in consideration of the premises and the mutual 
covenants and conditions herein contained, the Company and the Purchasers, 
severally and not jointly, hereby agree as follows:

                                    SECTION 1

             AUTHORIZATION, PURCHASE AND SALE OF SHARES AND WARRANTS

     1.1 AUTHORIZATION OF THE SHARES AND WARRANTS. The Company has, or before
the Closing (as defined in Section 2.1 hereof) will have, authorized the
issuance and sale of (i) up to sixty-four thousand (64,000) shares (the
"Shares") of Series A Preferred Stock, par value $.001 per share (the "Series A
Preferred"), having the rights, restrictions, privileges and preferences as set
forth in the Restated Certificate of Designation of Rights, Preferences &
Privileges of Series A Preferred Stock of the Company (the "Certificate"), the
form of which is attached to this Agreement as Exhibit A, and (ii) Common Stock
Subscription Warrants (each a "Warrant" and, collectively the "Warrants"),
substantially in the form of Exhibit B hereto, to purchase up to an aggregate of
eight hundred thousand (800,000) shares of Common Stock, par value $.001 per
share, subject to adjustment as provided herein and in the Warrants.

     1.2 SALE AND PURCHASE OF THE SHARES AND WARRANTS. Upon and subject to the
terms and conditions of this Agreement and in reliance upon the representations,
warranties and agreements contained herein, at the Closing the Company will
issue and sell to the Purchasers, and each Purchaser will purchase from the
Company at the Closing, (i) that number of Shares set forth opposite its name on
the Schedule of Purchasers, and (ii) Warrants to purchase the number of Warrant
Shares set forth opposite its name on the Schedule of Purchasers.

     1.3 CERTAIN DEFINED TERMS. Certain capitalized terms used in this 
Agreement shall have the respective meanings ascribed to them in Section 10 
hereof.

                                   SECTION 2

<PAGE>

                          CLOSING, PAYMENT AND DELIVERY

         2.1 CLOSING

                  (a) CLOSING DATE AND PLACE OF CLOSING. The closing (the
"Closing") of the purchase and sale of the Shares and the Warrants shall be held
on the date (the "Closing Date") of, and immediately following, the final
execution and delivery of at least one counterpart of this Agreement by the
Company and the Purchasers, or such other date as shall have been agreed to by
the Company and the Purchasers. The place of the Closing (including the place of
delivery to the Purchasers by the Company of the certificates evidencing all
Shares being purchased and the Warrants and the place of payment to the Company
by the Purchasers of the purchase price therefore) shall be at the offices of
Day, Berry & Howard LLP, 185 Asylum Street, CityPlace I, 25th Floor, Hartford,
Connecticut 06103-3499, or such other place as shall have been agreed to by the
Company and the Purchasers.

                  (b) CLOSING PAYMENT AND DELIVERY. At the Closing, each
Purchaser will pay to the Company the amount set forth opposite its name on the
Schedule of Purchasers, by check or wire transfer, at the Company's option, and,
in the case of Telantis Venture Partners V, Inc., for a portion of its payment,
by the surrender of promissory notes of the Company held by such investor in
principal amount of $200,000, and the Company will deliver to each Purchaser a
certificate or certificates for the number of shares and a Warrant for the
number of Warrant Shares, in each case set forth opposite its name on the
Schedule of Purchasers registered in each Purchaser's name (or in such name or
names as otherwise designated by such Purchaser).

         2.2 SALE OF ADDITIONAL SHARES AND WARRANTS. The Purchasers hereby 
agree that the Company may sell up to ninety-six thousand (96,000) shares of 
a new class of Preferred Stock which new class of Preferred Stock shall be 
identical in all respects to the Series A Preferred Stock and pari passu 
therewith in all respects, except that each share of such new class of 
Preferred Stock shall be convertible into Common Stock based upon an initial 
Conversion Price of $.50 per share of Common Stock (the "Additional Shares") 
and Common Stock Subscription Warrants to purchase up to an aggregate of six 
hundred thousand (600,000) shares of Common Stock at a price of $.65 per 
share (the "Additional Warrants"), to one or more purchasers (herein called 
the "Additional Purchasers") at a purchase price per unit of $6.25 for each 
Additional Share, provided that (i) the closing of such sale is consummated 
no later than November 30, 1998, (ii) such sale is made pursuant to this 
Agreement as supplemented by an agreement supplemental hereto which is 
executed by the Company and each Additional Purchaser, wherein it is stated 
that the Additional Shares and Additional Warrants are being sold pursuant to 
the terms of this Agreement as supplemented thereby, that the Additional 
Purchaser is deemed to be a Purchaser hereunder, that the Additional Shares 
and Additional Warrants are deemed to be Shares and Warrants, respectively 
for all purposes hereunder, and that the rights and privileges of the 
Additional Shares shall be set forth in a Certificate of Designation setting 
forth the rights of the new class of Preferred Stock, (iii) the Additional 
Purchaser becomes a party to the Shareholder's Agreement (as hereinafter 
defined), (iv) the Additional Purchaser and each agreement supplemental to 
this Agreement shall be approved by a majority of the 

                                       2

<PAGE>

entire Board of Directors of the Company; and (v) the Purchasers are granted 
preemptive rights to purchase the Additional Shares and Additional Warrants. 
Upon the issuance of Additional Shares, references to Series A Preferred 
Stock herein shall be deemed to refer to Series A Preferred Stock and such 
class of stock as shall have been issued as the Additional Shares, 
collectively.

                                    SECTION 3

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

         Except as expressly set forth (with reference to a paragraph in this
Section 3) on Schedule 2 (the "Schedule of Exceptions") hereto, the Company
hereby represents and warrants to the Purchasers as follows:

         3.1 ORGANIZATION AND STANDING; ARTICLES AND BY-LAWS.

                  (a) The Company and each Subsidiary is a corporation duly
organized, validly existing and in good standing under the laws of its state of
organization and is qualified, licensed or domesticated as a foreign corporation
in each jurisdiction wherein the nature of its activities or properties owned or
leased by it makes such qualification, licensing or domestication necessary,
except where the failure to be so qualified, licensed or domesticated would not
have a material adverse effect on the Company. The Schedule of Exceptions sets
forth the jurisdictions in which the Company or any Subsidiary is qualified,
licensed or domesticated as a foreign corporation. The Company and each
Subsidiary has all requisite power, governmental licenses, authorization
consents and approvals to own the properties owned by it and to conduct the
business as it is being conducted by it and as contemplated by the Confidential
Information Memorandum dated May 1998 (the "Confidential Information
Memorandum"), a true and correct copy of which has been given to the Purchasers
and special counsel for the Purchasers. The Schedule of Exceptions sets forth
all jurisdictions in which the Company or any Subsidiary owns or leases property
or engages in any activity.

                  (b) The Company has furnished special counsel for the 
Purchasers with true, correct and complete copies of the Company's and each 
Subsidiary's Certificate of Incorporation and By-Laws, and all amendments 
thereto through and including the Closing Date and each Additional Closing 
Date as applicable, and copies of the minutes of all Board of Directors, 
Committees of the Board of Directors and stockholders meetings of the Company 
or such Subsidiary. Prior to the Closing, the Company shall have properly 
filed and recorded the Certificate with the Secretary of the State of 
Delaware. The Company and each Subsidiary is not in breach of any of the 
provisions of its Certificate of Incorporation and is not in breach of any of 
the provisions of its By-Laws in any material respect.

         3.2 CORPORATE POWER. The Company and each Subsidiary, as applicable,
has all requisite corporate power to enter into this Agreement and each of the
Financing Documents and will have on 

                                       3

<PAGE>

the Closing Date all requisite corporate power to sell the Shares and to 
carry out and perform its obligations under the terms of this Agreement and 
each of the Financing Documents.

         3.3 SUBSIDIARIES. Except as set forth in the Schedule of Exceptions,
the Company has no Subsidiaries and does not own of record or beneficially any
capital stock or equity interest or investment in any corporation, partnership,
association or business entity. The Company is the sole owner of the securities
of each of the Subsidiaries.

         3.4 CAPITALIZATION. The Schedule of Exceptions contains a true and
correct list of all securities of the Company and each Subsidiary (including the
amounts thereof) outstanding immediately prior to the Closing, and the holders
of any interest in such securities. Immediately prior to the Closing, the
Company's authorized capital stock will consist of twenty-five million
(25,000,000) shares, consisting of (a) twenty million (20,000,000) shares of
Common Stock, par value $.001 per share ("Common Stock") of which four million
thirty nine thousand seven hundred sixty-two (4,039,762) shares will be issued
and outstanding on the Closing Date, and (b) five million (5,000,000) shares of
Preferred Stock, one hundred forty-four thousand (144,000) shares of which have
been designated as Series A Preferred, 80,000 of which will be issued and
outstanding prior to the Closing. Upon consummation of the Closing, all issued
and outstanding shares of capital stock of the Company will have been duly
authorized and validly issued, will be fully paid and nonassessable, and will
have been offered issued, sold and delivered by the Company in compliance with
applicable federal and state securities laws. Except as set forth in the
Schedule of Exceptions and the Shareholders' Agreement, there are no outstanding
preemptive or other preferential rights, conversion rights or other rights,
options, warrants or agreements granted or issued by or binding upon the Company
for the purchase or acquisition of any shares of its capital stock. The Company
holds no shares of its capital stock in its treasury.

         3.5 AUTHORIZATION.  All action on the part of the Company, the 
Subsidiaries, their directors and shareholders necessary for the 
authorization, execution, delivery and performance by the Company and the 
Subsidiaries, as applicable, of this Agreement and each of the Financing 
Documents and for the consummation of the transactions contemplated herein 
and therein, and for the authorization, issuance and delivery of the Shares 
and of the Conversion Shares has been taken or will be taken prior to the 
Closing. This Agreement and each of the Financing Documents is a valid and 
binding obligation of the Company and the Subsidiaries parties hereto and 
thereto, enforceable in accordance with their respective terms, subject to 
applicable bankruptcy, insolvency, reorganization and moratorium laws and 
other laws of general application affecting enforcement of creditors' rights 
generally. The execution and delivery by the Company and the Subsidiaries, as 
applicable, of this Agreement and each of the Financing Documents, and 
compliance herewith and therewith, and the issuance and sale of the Shares 
and the Conversion Shares will not, with or without notice or the passage of 
time or both, result in any material violation of and will not conflict with, 
or result in a breach of any of the terms of, or constitute a default under 
any provision of, any state or federal law to which the Company or any 
Subsidiary is subject, the Certificate or By-Laws, as amended, the 
Certificate of Incorporation or By-Laws of the Company or any Subsidiary or 
any mortgage, indenture, material agreement, instrument, judgment, decree, 
order, rule or regulation or other 

                                       4

<PAGE>

restriction to which the Company or any Subsidiary is a party or by which it 
or any of its property is bound, or may be affected, or result in the 
creation of any mortgage, pledge, lien, encumbrance or charge upon any of the 
properties or assets of the Company or any Subsidiary pursuant to any such 
term or give any other person or entity the right to accelerate the time for 
performance of any obligation of the Company or any Subsidiary. Except as set 
forth in the Shareholders' Agreement, no shareholder has any preemptive 
rights or rights of first refusal by reason of or in connection with the 
issuance of the Shares. The Shares, when issued in compliance with the 
provisions of this Agreement, will be validly issued, fully paid and 
nonassessable, and will be free of any liens or encumbrances. The Conversion 
Shares have been duly and validly reserved (and are in addition to any other 
shares reserved for any other purpose) and are not subject to any preemptive 
rights or rights of first refusal and, upon such issuance, will be validly 
issued, fully paid and nonassessable.

         3.6 FINANCIAL INFORMATION. Copies of (i) the audited balance sheet 
of the Company dated July 31, 1997 (the "Balance Sheet") and the related 
statements of operations and accumulated deficit and cash flows for the year 
then ended, accompanied by a report thereon containing an opinion without 
qualification of the Company's independent certified public accountants, and 
(ii) the unaudited balance sheet of the Company as of April 30, 1998 and the 
related statements of income for the nine months then ended (collectively, 
the "Financial Statements") and Financial Statements for each Subsidiary have 
been delivered to the Purchasers and special counsel for the Purchasers, 
present fairly the financial position of the Company or such Subsidiary as of 
such date, have been prepared in accordance with generally accepted 
accounting principles, consistently applied, except for those changes 
promulgated and required by accounting authority, and show all material 
liabilities, absolute or contingent, of the Company or such Subsidiary 
required to be recorded thereon in accordance with generally accepted 
accounting principles as of the date thereof.

         3.7 ABSENCE OF UNDISCLOSED LIABILITIES. The Company and each Subsidiary
does not have, and does not know of, any liabilities (fixed or contingent,
including without limitation any tax liabilities due or to become due), which,
either individually or in the aggregate, are material and not disclosed on the
Balance Sheet.

         3.8 ABSENCE OF CERTAIN CHANGES.  Since the date of the Balance 
Sheet, there has not been:

                  (a) Any change in the condition, assets, liabilities, 
prospects or business of the Company or any Subsidiary from that shown on the 
Balance Sheet or as described in the Plan which, either individually or in 
the aggregate, has been or is reasonably likely to be materially adverse;

                  (b) Any damage to, or destruction or loss of, any of the 
properties or assets of the Company or any Subsidiary (whether or not covered 
by insurance) materially adversely affecting the business or plans of the 
Company or any Subsidiary or the Technology;

                  (c) Any declaration, setting aside or payment or other
distribution in respect of any of the Company's capital stock, or any direct or
indirect redemption, purchase or other acquisition 

                                       5

<PAGE>

of any of such stock (or any warrant, option or other right with respect to 
such stock) by the Company or any Subsidiary or any repayment of Company or 
any Subsidiary debt held by any Related Party or by an Affiliate;

                  (d) Any organizational activity, collective bargaining 
activity, labor dispute or labor trouble;

                  (e) Any event or condition of any character, which, either
individually or in the aggregate, materially adversely affects the business,
operations or plans of the Company or any Subsidiary;

                  (f) Any action taken or entered into by the Company or any
Subsidiary involving any transaction other than in the usual and ordinary course
of business, except this Agreement;

                  (g) Any wage or salary increase made or granted, or entered
into by the Company or any Subsidiary involving any employment agreement other
than any agreement set forth in the Schedule of Exceptions;

                  (h) Any disclosure to any person of any material trade
secrets, except for disclosures made to persons subject to valid and enforceable
confidentiality agreements; or

                  (i) Any disposition of assets other than the sale of the
Company's products in the ordinary course of business.

         3.9 TAXES. The Company and each Subsidiary has filed or will file 
within the time prescribed by law (including extensions of time approved by 
any appropriate taxing authority) all tax returns and reports required to be 
filed with the United States Internal Revenue Service and with the States of 
California and Michigan and any other state in which such a filing is 
required, and (except to the extent that the failure to file would not have a 
material adverse effect on the condition or operations of the Company or such 
Subsidiary) with all other jurisdictions where such filing is required by 
law; and the Company and each Subsidiary has paid, or made adequate provision 
in the Balance Sheet for the payment of, all taxes, interest, penalties, 
assessments or deficiencies due in connection therewith. The Company and each 
Subsidiary has never had any tax deficiency proposed or assessed against it 
and the Company and each Subsidiary has executed no waiver of any statute of 
limitations on the assessment or collection of any tax or governmental 
charge. None of the Company's or any Subsidiary's federal income tax returns 
nor any state income, sales or franchise tax returns has ever been audited by 
governmental authorities. No tax audit, action, suit, proceeding, 
investigation or claim is now pending nor, to the best of the Company's 
knowledge after reasonable inquiry, threatened against the Company or any 
Subsidiary, and to the Company's knowledge, no issue or question has been 
raised (and is currently pending) by any taxing authority in connection with 
any of the Company's or any Subsidiary's tax returns or reports.

                                       6

<PAGE>

         The Company and each Subsidiary has withheld or collected from each 
payment made to each of their employees, the amount of all taxes (including, 
but not limited to, federal income taxes, Federal Insurance Contribution Act 
taxes and Federal Unemployment Tax Act taxes) required to be withheld or 
collected therefrom, and has paid the same to the proper tax receiving 
officers or authorized depositaries.

         3.10 LITIGATION. There is neither pending nor threatened any action, 
suit, proceeding or claim, whether or not purportedly on behalf of the 
Company, or any Subsidiary, to which the Company, or any Subsidiary or any 
employee of the Company or any Subsidiary is or may be named as a party or to 
which the Company's, any Subsidiary's or any such person's property is or may 
be subject. To the best of the Company's knowledge and belief, there is no 
basis for any such action, suit, proceeding or claim, in which an unfavorable 
outcome, ruling or finding in any such matter or for all such matters, taken 
as a whole, might have a material adverse effect on the condition, financial 
or otherwise, operations or prospects of the Company or any Subsidiary or on 
the Technology. The Company and the Founders have no knowledge of any 
unasserted claim, the assertion of which is likely and which, if asserted, 
will seek damages, an injunction or other legal, equitable, monetary or 
nonmonetary relief which if granted would have a material adverse effect on 
the condition, financial or otherwise, operations or prospects of the Company 
or any Subsidiary.

         3.11 CONSENTS. No consent, approval or authorization of, or
designation, declaration or filing with, any governmental authority on the part
of the Company or any Subsidiary, including and subject to the Company's
reliance on the accuracy of the representations of the Purchasers in Section 4
hereof, qualification under applicable state securities laws of the offer and
sale of the Shares and of the issuance of the Conversion Shares, is required in
connection with the valid execution and delivery of this Agreement, the offer,
sale or issuance of the Shares, the conversion of the Series A Preferred into
Common Stock or the issuance of the Conversion Shares, or the consummation of
any other transaction contemplated on the Closing Date by this Agreement or any
of the Financing Documents, except the filing of the Certificate with the
Secretary of the State of Delaware, which filing has been made and is effective
as of the date hereof.

         3.12 TITLE TO PROPERTIES; LIENS AND ENCUMBRANCES. The Company and each
Subsidiary has good and marketable title to all its properties and assets, free
from all mortgages, pledges, liens, security interests, conditional sale
agreements, encumbrances or charges, except as set forth on the Schedule of
Exceptions.

         3.13 FRANCHISES, LICENSES, TRADEMARKS, PATENTS AND OTHER RIGHTS.

                  (a) All (i) franchises, permits, licenses and other similar 
authority, (ii) patents, patent applications, patent rights, service marks, 
trademarks, trademark applications, trademark rights, trade names, trade name 
rights and copyrights (whether registered or not), and (iii) know-how, 
technology and trade secrets, which, in any case, are owned, possessed or 
used by Michael Feygin, Alexander Shkolnik, Michael N. Diamond, Emmanual 
Dvorskiy, Sung Sik Pak and James Ogg (the "Patent Holders"), or which any of 
the Patent Holders has the right to own, possess or use, and which are or may 
be material now or in the future for the conduct of the Company's and each 
Subsidiary's 

                                       7

<PAGE>

business as now conducted or as planned to be conducted, have been duly and 
validly transferred in full to the Company. The documents and instruments 
evidencing such transfer are listed in the Schedule of Exceptions, and a copy 
thereof has been delivered to special counsel for the Purchasers.

                  (b) The Company and each Subsidiary has all franchises, 
permits, licenses and other similar authority, necessary for the conduct of 
its business as now being conducted by it, except where the failure to have 
such franchises, permits, licenses or other similar authority would not have 
a material adverse effect on the Company or the Technology, and believes it 
can obtain any similar authority necessary for the conduct of its business as 
planned to be conducted, and it is not in violation, nor will the 
transactions contemplated by this Agreement cause a violation of any material 
term or provision of any such franchise, permit, license or other similar 
authority.

                  (c) The Schedule of Exceptions lists all patents, patent 
applications, patent rights, trademarks, trademark applications, trademark 
rights, trade names, trade name rights, service marks and copyrights (whether 
registered or not) owned or possessed by the Company and each Subsidiary 
(collectively, the "Listed Rights"). The Listed Rights comprise all the 
patents, patent applications, patent rights, trademarks, trademark 
applications, trademark rights, trade names, trade name rights, service marks 
and copyrights (whether registered or not) necessary to the conduct of the 
Company's and each Subsidiary's business as now being conducted, and the 
Company believes that the Company and each Subsidiary can obtain any such 
rights necessary for the conduct of its business as planned to be conducted. 
The Company and each Subsidiary has and possesses the know-how, technology 
and trade secrets not included in the Listed Rights (such know-how, 
technology and trade secrets being collectively called the "Intellectual 
Property") which they believe to be necessary (i) to conduct the Company's 
and each Subsidiary's business as now being conducted, and (ii) with 
additional know-how, technology and trade secrets which the Company and the 
Subsidiaries plan to develop, for the conduct of their business as planned to 
be conducted. (The Listed Rights and the Intellectual Property collectively 
constitute the "Technology"). There is neither pending, nor, to the best of 
the Company's knowledge and belief, threatened, any claim or litigation 
against the Company or any Subsidiary contesting the validity or right to use 
any of the Listed Rights or any of the Intellectual Property, nor is the 
Company or any Founder or any Subsidiary aware of any basis therefor, and 
neither the Company nor any Subsidiary has received any notice of 
infringement upon or conflict with any asserted right of others. To the best 
of the Company's knowledge and belief, no person, corporation or other entity 
is infringing or violating the Listed Rights or any of the Intellectual 
Property. Except as described in the Schedule of Exceptions, the Company has 
no obligation to compensate others for the use of any Listed Right or any 
Intellectual Property, nor has the Company or any Subsidiary granted any 
license or other right to use, in any manner, any of the Listed Rights or 
Intellectual Property, whether or not requiring the payment of royalties. The 
Company has no knowledge of any current or anticipated narrowing of the 
claims under any of its patents.

         3.14 ISSUANCE TAXES. All taxes imposed by any state in connection with
the issuance, sale and delivery of the Shares shall have been fully paid, and
all laws imposing such taxes shall have been fully complied with, prior to the
Closing Date.

                                       8

<PAGE>

         3.15 OFFERING. Within the past six (6) months, the Company has not,
either directly or through any agent, offered any of the Shares or the Warrants
or any security or securities similar to the Shares or the Warrants for sale to,
or solicited any offers to buy the Shares or the Warrants or any part thereof or
any such similar security or securities from, or otherwise approached or
negotiated in respect thereof with, any party or parties other than the
Purchasers or institutional or other sophisticated investors, each of which was
offered all or a portion of the Shares and Warrants at private sale for
investment.

         Subject in part to the truth and accuracy of the Purchasers'
representations set forth in this Agreement, the offer, sale and issuance of the
Shares as contemplated by this Agreement are exempt from the registration
requirements of the Securities Act of 1933, as amended (the "Securities Act"),
and all state securities laws, and neither the Company nor anyone acting on its
behalf will take any action hereafter that would cause the loss of such
exemption.

         3.16 COMPLIANCE WITH OTHER INSTRUMENTS. Neither the Company nor any
Subsidiary is in violation of any term of its Certificate of Incorporation or
By-Laws. Neither the Company, any Subsidiary or any of their property is in
violation of any term of any mortgage, indenture, contract, agreement,
instrument, judgment, decree, order, statute, rule or regulation to which the
Company, any subsidiary or any of such property is subject, a violation of which
would materially adversely affect the Company's condition, financial or
otherwise, or operations.

         3.17 EMPLOYEES.

                  (a) No employee of the Company or any Subsidiary and no 
Related Party is, or is now expected to be, in violation of any term of any 
employment contract, patent disclosure agreement, non-competition agreement, 
or any other contract or agreement with any prior employer or any other 
person, corporation, or other entity or any restrictive covenant in such an 
agreement, or any obligation imposed by common law or otherwise, relating to 
the right of any such employee or Related Party to be employed by the Company 
or companies similarly situated because of the nature of the business 
conducted or to be conducted by the Company, or any Subsidiary or companies 
similarly situated or relating to the use of trade secrets or proprietary 
information of others, and the continued employment of the Company's or any 
Subsidiary's employees and/or Related Parties does not subject the Company, 
any Subsidiary or Purchaser to any liability for any such violation.

                  (b) The Schedule of Exceptions sets forth a complete list of
the name and position of each person who has executed a Invention and Secrecy
and Agreement to the effect and in substantially the form set forth in Exhibit C
hereto. To the best of the Company's knowledge and belief, no employee or former
employee of the Company or any Subsidiary is, or to the best of the Company's
knowledge and belief now is expected to be, in violation of the terms of the
aforesaid agreement or of any other obligation relating to the use of
confidential or proprietary information of the Company or such Subsidiary. Each
of such Invention and Secrecy Agreements remains in full force and effect.

                                       9

<PAGE>

                  (c) The Schedule of Exceptions sets forth the current
compensation of each officer, director or employee of the Company and each
Subsidiary being paid (or to whom the Company or such Subsidiary has agreed to
pay) compensation at a rate of $50,000 per year or more.

                  (d) To the best knowledge of the Company, no officer or key 
employee of the Company or any Subsidiary has any present intent of 
terminating such officer's or key employee's employment with the Company or 
such Subsidiary.

                  (e) The Company and each Subsidiary is in full compliance with
all laws regarding employment, wages, hours, equal opportunity, collective
bargaining and payment of Social Security and other taxes. The Company and each
Subsidiary is in compliance with all applicable foreign, federal, state and
local laws and regulations regarding occupational safety and health standards
and has received no complaints from any foreign, federal, state or local agency
or regulatory body alleging violations of any such laws and regulations.

                  (f) Except as set forth on the Schedule of Exceptions hereto,
the employment of all persons and officers employed by the Company and each
Subsidiary is terminable at will without any penalty or severance obligation of
any kind on the part of the employer. All sums due for employee compensation and
benefits and all vacation time owing to any employees of the Company and each
Subsidiary have been duly and adequately accrued on the accounting records of
the Company. All employees of the Company and each Subsidiary are either United
States citizens or resident aliens specifically authorized to engage in
employment in the United States in accordance with all applicable laws.

                  (g) Neither the Company nor any Subsidiary has experienced, 
nor does it know or have reasonable grounds to know of any basis for, any 
strike, labor troubles or strife, work stoppages, slow downs, or other 
interference with or impairment of its business. Neither the Company nor any 
Subsidiary has experienced, nor does it know or have reasonable grounds to 
know of, any union or collective bargaining organization efforts or 
negotiations, or requests for negotiations, for any representation or any 
labor contract relating to any employees of the Company or any Subsidiary.

         3.18 BUSINESS OF THE COMPANY. The Company has no knowledge or belief
that (i) there is pending or threatened any claim or litigation against or
affecting the Company or any Subsidiary contesting its right manufacture, sell
or use any product or service presently manufactured, sold or used or planned to
be manufactured, sold or used by the Company or any Subsidiary, (ii) there
exists, or there is pending or planned, any statute, rule, law, regulation,
standard or code which would materially adversely affect the condition,
financial or otherwise, the operations or the prospects of the Company or any
Subsidiary, or (iii) there is any other fact which in the future may materially
adversely affect the Company's or any Subsidiary's condition, financial or
otherwise, operations or prospects. The Company and each Subsidiary currently
intends to engage in the business of the general type described in the SEC
Documents.

                                       10
<PAGE>
         3.19  USE OF PROCEEDS.  The Company will use the proceeds of the 
offering for general working capital purposes. The Company will not use the 
proceeds of the offering for other business purposes. None of the 
transactions contemplated in this Agreement (including, without limitation, 
the use of the proceeds from the sale of the Shares) will violate or result 
in a violation of Section 7 of the Securities Exchange Act of 1934, as 
amended, or any regulations issued pursuant thereto, including, without 
limitation, Regulations G, T and X of the Board of Governors of the Federal 
Reserve System, 12 C.F.R., Chapter 11. The Company does not own or intend to 
carry or purchase any "margin security" within the meaning of said Regulation 
G, including margin securities originally issued by it. None of the proceeds 
from the sale of the Shares will be used to purchase or carry (or refinance 
any borrowing the proceeds of which were used to purchase or carry) any 
"security" within the meaning of the Securities Act.

         3.20  APPLICABILITY OF, AND COMPLIANCE WITH, OTHER LAWS.

                  (a) Neither the Company nor any Subsidiary has or makes 
contributions to any pension plans, defined benefit plans or defined 
contribution plans for its employees which are subject to the Employee 
Retirement Income Security Act of 1974, as amended ("ERISA"), except as set 
forth on the Schedule of Exceptions. With respect to such plans, if any, 
listed on the Schedule of Exceptions, the Company and each Subsidiary is in 
compliance with the applicable provisions of ERISA in all material respects. 
Neither the Company nor any Subsidiary has incurred any unremedied 
accumulated funding deficiency within the meaning of ERISA or any unsatisfied 
liability to the Pension Benefit Guaranty Corporation established under ERISA 
in connection with any employee pension plan established or maintained by the 
Company or such Subsidiary under the jurisdiction of ERISA. No Reportable 
Event or Prohibited Transaction (as defined in Section 4043 of ERISA) has 
occurred with respect to any plan administered by the Company or any 
Subsidiary.

                  (b) The Company's and each Subsidiary's employment practices
and policies are in compliance with (i) all applicable laws of the United States
and each applicable jurisdiction relating to equal employment opportunity, and
any rules, regulations, administrative orders and Executive Orders relating
thereto, and (ii) the applicable terms, relating to equal opportunity, of any
contract, agreement or grant the Company and each Subsidiary has with, from or
relating (by way of subcontract or otherwise) to any other contract, agreement
or grant of, any federal or state governmental unit. Neither the Company nor any
Subsidiary has been the subject of any charge of unfair labor practices,
employment discrimination made against it by the National Labor Relations Board,
the United States Equal Employment Opportunity Commission or any other
governmental unit, or is presently subject to any formal or informal proceedings
before, or investigations by, such Commission or governmental unit. To the
Company's knowledge, neither the Company, nor any Subsidiary, nor any employees
of the Company or of Subsidiaries, nor any Related Parties are presently under
investigation by any commission or governmental agency for purposes of security
clearance or otherwise.

                  (c) Neither the Company nor any Subsidiary or any property
owned or occupied by the Company or such Subsidiary is in violation of any


                                      11
<PAGE>

Federal or State Environmental Law of any sort or in violation of any Federal 
or State "OSHA" law, so-called. The Schedule of Exceptions contains a list of 
all environmental permits held by the Company and each Subsidiary which are 
material to the Company or such Subsidiary. Without limiting the foregoing:

                           (i)  ENVIRONMENTAL PERMITS.  The Company and each 
         Subsidiary has obtained all environmental, health and safety permits 
         and governmental authorizations (collectively, the "Environmental 
         Permits") necessary for the construction of their facilities (for 
         any facility constructed by or at the direction of the Company) or 
         the conduct of their operations, and all such Environmental Permits 
         are in good standing and the Company and each Subsidiary is in 
         material compliance with all terms and conditions of the 
         Environmental Permits. To the Company's knowledge, no notice to, 
         approval of or authorization or consent from any governmental or 
         regulatory authority is necessary for the transfer of or 
         modification to any Environmental Permit and the consummation of the 
         transactions contemplated by this Agreement will not violate, alter, 
         impair or invalidate, in any respect, any Environmental Permit.

                           (ii)  ENVIRONMENTAL CLAIMS.  There is no 
         Environmental Claim pending, or to the Company's knowledge, 
         threatened or reasonably likely to be threatened (i) against the 
         Company or any Subsidiary, (ii) against any person or entity whose 
         liability for any Environmental Claim the Company or any Subsidiary 
         has or may reasonably be expected to have retained or assumed either 
         contractually or by operation of law, or (iii) against any real or 
         personal property or operations which are now or have been 
         previously owned, leased, operated or managed, in whole or in part, 
         by the Company or any Subsidiary.

                           (iii)  RELEASES.  There have been no Releases of 
         any Hazardous Materials that would be likely to form the basis of 
         any Environmental Claim against the Company, any Subsidiary or 
         against any person or entity whose liability for any Environmental 
         Claim the Company or any Subsidiary has or may have retained or 
         assumed either contractually or by operation of law.

                           (iv)  ENVIRONMENTAL ASSESSMENTS.  There are no 
         environmental reports, audits, investigations or assessments of the 
         Company, any Subsidiary, or any real or personal property or 
         operations which are now or have been previously owned, leased, 
         operated or managed, in whole or in part, by the Company or such 
         Subsidiary.

                  (d)  Neither the Company nor any Subsidiary has violated 
any law or any governmental law, rule, order or regulation or requirement 
which violation through the date hereof has had or would reasonably be 
expected to have a material adverse effect upon the financial condition, 
operating results, assets, operations or business prospects of the Company 
and its Subsidiaries and neither the Company nor any Subsidiary has received 
notice of any such violation.

         3.21  CONDITION OF PROPERTIES.  All facilities, machinery, 
equipment, fixtures, vehicles and other properties owned, leased or used by 
the Company and each Subsidiary are in good operating 


                                      12
<PAGE>

condition and repair, ordinary wear and tear excepted, are reasonably fit and 
usable for the purposes for which they are being used, are adequate and 
sufficient for the Company's and each Subsidiary's businesses and conform in 
all material respects with all applicable ordinances, regulations and laws.

         3.22  INSURANCE COVERAGE.  Neither the Company nor any Subsidiary 
has been refused any insurance coverage sought or applied for, and the 
Company has no reason to believe that it will be unable to obtain one or more 
policies of insurance issued by insurers of recognized responsibility, 
insuring the Company, its Subsidiary and their properties and business 
against such losses and risks, and in such amounts, as are customary in the 
case of corporations of established reputation engaged in the same or similar 
business and similarly situated. The Schedule of Exceptions sets forth each 
insurance policy (specifying the insurer, the amount of coverage and the type 
of insurance) maintained by the Company and each Subsidiary relating to its 
respective properties, assets, business or personnel, and each inspection 
report or recommendation, if any, during the last three years as to the 
conditions of the properties and assets owned, leased, occupied or operated 
by it or the conduct of its business. Neither the Company nor any Subsidiary 
is in default with respect to any provision contained in any insurance 
policy, and neither the Company nor any Subsidiary has failed to give any 
notice or present any presently existing claims under any insurance policy in 
due and timely fashion.

         3.23  REGISTRATION RIGHTS.  Other than under this Agreement or as 
listed in the Schedule of Exceptions, the Company has not agreed to register 
under the Securities Act any of its authorized or outstanding securities.

         3.24  SEC DOCUMENTS.  The Company has filed all required reports, 
schedules, forms, statements and other documents with the Securities and 
Exchange Commission (the "SEC") (any of the foregoing are referred to herein 
as the "SEC Documents") since March 7, 1996. As of their respective dates, 
the SEC Documents complied in all material respects with the requirements of 
the Securities Act, or the Exchange Act, as the case may be, and the rules 
and regulations of the SEC promulgated thereunder applicable to such SEC 
Documents, and none of the SEC Documents contained any untrue statement of a 
material fact or omitted to state a material fact required to be stated 
therein or necessary in order to make the statements therein, in light of the 
circumstances under which they were made, not misleading. Except to the 
extent that information contained in any SEC Document has been revised or 
superseded by a later-filed SEC Document, none of the SEC Documents contain 
any untrue statement of a material fact if such statement were made as of the 
date hereof or omits to state any material fact that would be required to be 
stated therein if filed as of the date hereof, or necessary in order to make 
the statements therein, in light of the circumstances under which they were 
made, not misleading. The financial statements of the Company included in the 
SEC Documents comply as to form in all material respects with applicable 
accounting requirements and the published rules and regulations of the SEC 
with respect thereto, have been prepared in accordance with generally 
accepted accounting principles (except, in the case of unaudited statements, 
as permitted by Form 10-Q of the SEC) applied on a consistent basis during 
the periods involved (except as may be indicated in the notes thereto) and 
fairly present the consolidated financial position of the Company and its 
consolidated subsidiaries as of the dates thereof and the consolidated 
results of their operations and cash flows for the periods then ended 
(subject, in the case of unaudited statements, 

                                    13
<PAGE>

to normal year-end audit adjustments). All of the Company's SEC documents 
filed since March 7, 1996 have been provided to the Purchasers.

         3.25  DISCLOSURE.  Neither this Agreement, the Schedule of 
Exceptions, the Balance Sheet, the Financial Statements nor the SEC Documents 
contains any untrue statement of a material fact or omits to state a material 
fact necessary in order to make the statements contained therein or herein 
not misleading in the light of the circumstances under which they were made. 
There is no fact which the Company has not disclosed to the Purchasers in 
writing or in the SEC Documents that materially adversely affects or, so far 
as the Company can now foresee, will materially adversely affect the 
properties, business, prospects, profits or condition (financial or 
otherwise) of the Company and the Subsidiaries or the ability of the Company 
to perform this Agreement and the Financing Documents or the other actions 
contemplated hereby. The forecasts, projections, estimates and other 
forward-looking matters furnished to the Purchasers were prepared in good 
faith on the basis of the Company's best estimates. The Company does not have 
any reason to believe that any assumptions or statements of opinion contained 
in such forecasts, projections, estimates or other forward-looking matters 
are unreasonable or false.

                                      14
<PAGE>
                                       
                                   SECTION 4

                  REPRESENTATIONS AND WARRANTIES OF PURCHASER

         Each of the Purchasers represents and warrants to the Company, as to 
itself only, as follows:

         4.1  EXPERIENCE.  It is experienced in evaluating and investing in 
companies such as the Company.

         4.2  INVESTMENT.  It is acquiring the Shares and the Warrants for 
investment for its own account and not with the view to, or for resale in 
connection with, any distribution thereof. It understands that the Shares, 
the Conversion Shares, the Warrants and the Warrant Shares have not been 
registered under the Securities Act by reason of an exemption from the 
registration provisions of the Securities Act which depends upon, among other 
things, the bona fide nature of its investment intent as expressed herein.

         4.3  RULE 144.  It acknowledges that the Shares, the Conversion 
Shares, the Warrants and the Warrant Shares must be held indefinitely unless 
they are subsequently registered under the Securities Act or an exemption 
from such registration is available. It has been advised or is aware of the 
provisions of Rule 144 promulgated under the Securities Act, which permits 
limited resale of shares purchased in a private placement subject to the 
satisfaction of certain conditions (which conditions cannot presently be 
satisfied).

         4.4  ACCESS TO DATA.  It has had an opportunity to discuss the 
Company's business, management and financial affairs with the Company's 
management, and it has been furnished with copies of documents which it has 
requested.

         4.5  ACCREDITED INVESTOR.  It is an Accredited Investor as defined 
in Regulation D under the Securities Act.

         4.6  RESTRICTIONS UNDER SECURITIES LAWS.  It is aware (and its 
respective employees, advisors, representatives and affiliates who are or who 
it currently anticipates will be apprised of matters relating to this 
Agreement, or the transactions contemplated hereby or thereby have been 
advised), that the United States securities laws prohibit any person or 
entity who has material non-public information about a company from 
purchasing or selling securities of such company. It agrees that it shall not 
directly or indirectly, alone or with others, in any manner acquire or 
attempt to acquire or dispose of or attempt to dispose of any securities of 
the Company in violation of applicable securities laws, and that it shall 
make best efforts to instruct its respective employees, advisors, 
representatives and affiliates who are apprised of matters relating to this 
Agreement, or the transactions contemplated hereby or thereby to comply with 
such prohibitions.


                                      15
<PAGE>

                                   SECTION 5

                       CONDITIONS TO CLOSING OF PURCHASER

         The obligation of the Purchasers to purchase the Shares to be 
purchased by them at the Closing is subject to the fulfillment to their 
satisfaction on or prior to the Closing Date of each of the following 
conditions:

         5.1  REPRESENTATIONS AND WARRANTIES CORRECT.  The representations 
and warranties made by the Company in Section 3 hereof shall be true and 
correct in all respects when made, and shall be true and correct in all 
respects on the Closing Date and with respect thereto, after giving effect to 
the sale and issuance of the Shares and the Warrants at the Closing.

         5.2  PERFORMANCE.  All covenants, agreements and conditions 
contained in this Agreement (including those in Section 2.1) to be performed 
or complied with by the Company on or prior to the Closing Date shall have 
been so performed or complied with in all material respects.

         5.3  COMPLIANCE CERTIFICATE.  The Company shall have executed and 
delivered to the Purchasers a certificate of the President of the Company, 
dated the Closing Date, certifying to the fulfillment of the conditions 
specified in Sections 5.1 and 5.2 of this Agreement and such other matters as 
the Purchasers may reasonably request.

         5.4  OPINION OF COMPANY'S COUNSEL.  The Purchasers shall have 
received (a) an opinion of counsel from Stradling Yocca Carlson & Rauth 
counsel to the Company, addressed to them, dated the Closing Date, to the 
effect and in substantially the form set forth in Exhibit D. and (b) an 
opinion of patent counsel to the Company addressed to the Purchasers in form 
and scope reasonably satisfactory to the Purchasers.

         5.5  GOOD STANDING CERTIFICATES.  The Company shall have delivered 
to the Purchasers a certificate of recent date from the Secretary of State of 
the State of the Company's and each Subsidiary's state of incorporation with 
respect to the Company's and each Subsidiary's due incorporation, good 
standing, legal corporate existence, due authorization to conduct business 
and the payment of all franchise taxes, and, certificates from the Secretary 
of State in each jurisdiction in which the Company or any Subsidiary is 
required to be qualified to do business with respect to the Company's or such 
Subsidiary's good standing and due authorization to conduct business therein, 
except where the failure to be so qualified would not have a material adverse 
effect on the Company and payment of all qualification fees that have become 
due and payable.

         5.6  LEGAL INVESTMENT.  At the time of the Closing, the purchase of 
the Shares and the Warrants to be purchased by the Purchasers hereunder shall 
be legally permitted by all laws and regulations to which it and the Company 
and its Subsidiaries are subject.


                                      16
<PAGE>

         5.7  QUALIFICATIONS.  All authorizations, approvals, or permits of 
any governmental authority or regulatory body that are required in connection 
with the lawful issuance and sale of the Shares and the Warrants pursuant to 
this Agreement, the conversion of the Shares into Common Stock, the issuance 
of such Common Stock upon such conversion, the exercise of the Warrants and 
the issuance of the Warrant Shares upon such exercise, shall have been duly 
obtained and shall be effective on and as of the Closing Date, including, if 
necessary, permits from applicable state securities authorities, qualifying 
the offer and sale of the Shares, the Conversion Shares, the Warrants and the 
Warrant Shares.

         5.8  AMENDMENT OF CERTIFICATE AND FILING OF CERTIFICATE.  The 
Certificate of Incorporation of the Company shall have been duly amended as 
set forth in Exhibit A hereto. The Certificate shall have been filed with the 
Secretary of the State of Delaware.

         5.9  PROCEEDINGS AND DOCUMENTS.  All corporate and other proceedings 
in connection with the transactions contemplated hereby and all documents and 
instruments incident to such transactions shall be satisfactory in substance 
and form to the Purchasers and special counsel for the Purchasers.

         5.10  PROVISIONS OF BY-LAWS.  The By-Laws of the Company shall 
provide that (a) a majority of the Directors constituting the Board shall 
constitute a quorum for the transaction of any business at a meeting of the 
Board, and (b) the number of Directors shall be no greater than seven (7).

         5.11  SHAREHOLDERS' AGREEMENT.  The Company and the Purchasers shall 
have executed and delivered a Shareholders' Agreement (the "Shareholders' 
Agreement") to the effect and in substantially the form set forth in Exhibit 
E hereto.

         5.12  KEY PERSON LIFE INSURANCE.  The Company shall have delivered 
to the Purchasers evidence of insurance on the lives of Michael Feygin and 
Gary S. Moskovitz in the amount of $2,000,000 naming the Company as the owner 
and beneficiary thereof.
                                       
                                   SECTION 6

                       CONDITIONS TO CLOSING OF COMPANY

         The Company's obligation to sell the Shares to be purchased at the 
Closing is subject to the fulfillment to its satisfaction on or prior to the 
Closing Date of each of the following conditions:

         6.1  REPRESENTATIONS.  The representations made by the Purchasers 
pursuant to Section 4 hereof shall be true and correct when made and shall be 
true and correct on the Closing Date.

         6.2  LEGAL INVESTMENT.  At the time of the Closing, the conditions 
set forth in Sections 5.7 and 5.8 shall have occurred and the purchase of the 
Shares to be purchased by the Purchasers 


                                      17
<PAGE>

hereunder shall be legally permitted by all laws and regulations to which the 
Purchasers and the Company are subject.

                                   SECTION 7

                            COVENANTS OF THE COMPANY

         The Company hereby covenants and agrees, so long as any Purchaser 
owns any Shares, any Conversion Shares or any Exchange Notes or as otherwise 
provided in this Article 7:

         7.1  BASIC FINANCIAL INFORMATION.  The Company will furnish the 
following reports to the Purchasers:

                  (a)  As soon as practicable after the end of each fiscal 
year of the Company, and in any event within ninety (90) days thereafter, a 
consolidated (and consolidating) balance sheet of the Company and its 
Subsidiaries, if any, as at the end of such fiscal year, and consolidated 
(and consolidating) statements of operations, accumulated earnings and cash 
flows of the Company and its Subsidiaries, if any, for such year, prepared in 
accordance with generally accepted accounting principles consistently applied 
and setting forth in each case in comparative form the figures for the 
previous fiscal year, all in reasonable detail audited (without scope 
limitations imposed by the Company) and certified by independent public 
accountants of recognized national standing selected by the Company and 
satisfactory to the Purchasers.

                  (b)  As soon as practicable after the end of the first, 
second and third quarterly accounting periods in each fiscal year of the 
Company, and in any event within thirty (30) days thereafter, a consolidated 
(and consolidating) balance sheet of the Company and its Subsidiaries, if 
any, as of the end of each such quarterly period, and consolidated (and 
consolidating) statements of operations, accumulated earnings and cash flows 
of the Company and its Subsidiaries, if any, for such period and for the 
current fiscal year to date, prepared in accordance with generally accepted 
accounting principles consistently applied and setting forth in comparative 
form the figures for the corresponding periods of the previous fiscal year, 
subject to changes resulting from year-end audit adjustments, and setting 
forth any events which could reasonably be expected to have an adverse effect 
upon the Company's or any Subsidiary's finances or the results of its 
operations, all in reasonable detail and certified by the principal financial 
or accounting officer of the Company.

                  (c)  So long as the Company is subject to the reporting 
requirements of the Securities Exchange Act of 1934, as amended (the 
"Exchange Act"), and in lieu of the financial information required pursuant 
to Sections 7.1(a) and (b), but within the time periods required for the 
furnishing thereof, copies of all SEC Documents filed by the Company, 
including, but not limited to, its reports filed on Form 10-KSB, Form 10-QSB, 
Form 8-K or any successor form or forms.


                                      18
<PAGE>

                  (d)  Each set of financial statements delivered to the 
Purchasers pursuant to Section 7.1 will be accompanied by a certificate of 
the Chairman, President or a Vice President and the Treasurer or an Assistant 
Treasurer of the Company setting forth:

                           (i)  Covenant Compliance - any information 
         required in order to establish whether the Company and its 
         Subsidiaries were in compliance with the requirements of this 
         Section 7 during the period covered by the income statement then 
         being furnished; and

                          (ii)  Event of Default - that the signers have 
         reviewed the relevant terms of this Agreement and have made, or 
         caused to be made, under their supervision, a review of the 
         transactions and conditions of the Company and its Subsidiaries, if 
         any, from the beginning of the accounting period covered by the 
         income statements being delivered therewith to the date of the 
         certificate and that such review has not disclosed the existence 
         during such period of any condition or event which constitutes a 
         breach or default under this Agreement or any of the other 
         agreements contemplated hereby or, if any such condition or event 
         existed or exists, specifying the nature and period of existence 
         thereof and what action the Company has taken or proposes to take 
         with respect thereto.

         7.2  ADDITIONAL INFORMATION AND RIGHTS.

         The Company will, for any Purchaser which owns any Shares or 10% or 
more of the Conversion Shares, Warrant Shares or Exchange Notes:

                  (a)  Permit such Purchaser (or its designated 
representative) to visit and inspect any of the properties of the Company and 
its Subsidiaries, including its books of account, and to discuss its affairs, 
finances and accounts with the Company's and its Subsidiaries' officers and 
its independent public accountants, all at such reasonable times and as often 
as any such party may reasonably request. Any such Purchaser shall give not 
less than two (2) business days notice of any such visitation or inspection 
and such visitation or inspection shall be performed in a reasonable manner 
and with due regard to the proprietary and confidential nature of any 
information received by it.

                  (b)  Deliver the reports and data described below to such 
Purchaser:

                           (i)  At such Purchaser's request, at such time as 
         such information is delivered to the Company's Board of Directors, 
         all monthly financial statements delivered to the Company's Board of 
         Directors, including, without limitation, a consolidated balance 
         sheet of the Company and its Subsidiaries, if any, as at the end of 
         such month, and consolidated statements of operations, accumulated 
         earnings and cash flows of the Company and its Subsidiaries, if any, 
         for each month, prepared in accordance with generally accepted 
         accounting principles consistently applied; provided that if the 
         Company does not prepare the foregoing financial statements within 
         thirty (30) days after the end of any fiscal month, the Company 
         agrees to make its records available and to make Company management 
         available 

                                      19
<PAGE>

         for consultation with the Purchasers and/or their agents or 
         consultants in order that the Purchasers shall be able, at their own 
         expense, to develop or complete such financial statements. In the 
         event that the Company wishes to use such financial statements 
         developed by the Purchasers, the Purchasers may charge the Company a 
         reasonable consulting fee therefor.

                          (ii)  Make best efforts to deliver sixty (60) days 
         or more before the commencement of its fiscal year the Company's 
         budget and its operating plan (the "Annual Budget") approved by the 
         Board indicating, among other things, quarterly income statements, 
         balance sheets and cash flow statements for the next fiscal year, 
         plans for incurring indebtedness and projections regarding other 
         sources of funds; any material changes in such financial plan shall 
         be submitted as promptly as practicable after such changes have been 
         approved by the Board; provided that if the Company does not prepare 
         an Annual Budget by 60 days before the commencement of its fiscal 
         year or notifies the Purchasers that it does not intend to do so, 
         the Company agrees to make the Company's records available and to 
         make Company management available for consultation with the 
         Purchasers and/or their agents or consultants in order that the 
         Purchasers shall be able, at their own expense, to develop or 
         complete such Annual Budget. In the event that the Company wishes to 
         use such Annual Budget developed by the Purchasers, the Purchasers 
         may charge the Company a reasonable consulting fee therefor.

                         (iii)  As soon as available, information and data on 
         any material adverse changes in or any event or condition which 
         materially adversely affects or could materially adversely affect 
         the business, operations, properties or plans of the Company;

                          (iv)  Immediately upon becoming aware of any 
         condition or event which constitutes a breach of this Agreement, the 
         Financing Documents or any agreement contemplated hereby or thereby, 
         written notice specifying the nature and period of existence thereof 
         and what action the Company is taking or proposes to take with 
         respect thereto; and

                           (v)  With reasonable promptness, such other 
         information and data with respect to the Company and its 
         Subsidiaries as any such party may from time to time reasonably 
         request.

                  (c)  Hold meetings of its Directors at least quarterly and 
provide ten (10) days notice in writing of such meetings and in any event 
such Purchaser shall receive notice no less favorable than any other outside 
director (provided, however, that in the case of emergency, the Purchaser 
shall be given no less than 2 hours notice and permitted to participate by 
telephone) and, if such Purchaser does not have a representative on the Board 
of Directors and holds at least 16,000 of the Shares or Exchange Notes 
received in exchange therefor, will permit such Purchaser to send a 
representative (without voting rights and subject to such representative 
executing a confidentiality agreement in a form to be provided by the 
Company) to each meeting of the Board of Directors of the Company and all 
committees of such Board.

                                      20

<PAGE>

         7.3  PROMPT PAYMENT OF TAXES, ETC.  The Company will promptly pay 
and discharge, or cause to be paid and discharged, when due and payable, all 
lawful taxes, assessments and governmental charges or levies imposed upon the 
income, profits, property or business of the Company or any Subsidiary; 
PROVIDED, HOWEVER, that any such tax, assessment, charge or levy need not be 
paid if the validity thereof shall at the time be contested in good faith by 
appropriate proceedings, and provided, further, that unless otherwise 
approved by the Board, the Company will pay all such taxes, assessments, 
charges or levies forthwith upon the commencement of proceedings to foreclose 
any lien which may have attached as security therefor. Unless otherwise 
approved by the Board, the Company will promptly pay or cause to be paid when 
due, or in conformance with customary trade terms, all other obligations 
incident to its operations.

         7.4  MAINTENANCE OF PROPERTIES AND LEASES.  The Company and each 
Subsidiary will keep its properties in good repair, working order and 
condition, reasonable wear and tear excepted, and from time to time make all 
needful and proper, or legally required, repairs, renewals, replacements, 
additions and improvements thereto; and the Company and each Subsidiary will 
at all times comply with each provision of all leases to which it is a party 
or under which it occupies, or has possession of, property if the breach of 
such provision might have a material adverse effect on the condition, 
financial or otherwise, or operations of the Company or any Subsidiary.

         7.5  INSURANCE.  The Company will keep its assets and those of its 
Subsidiaries which are of an insurable character insured by financially sound 
and reputable insurers against loss or damage by fire, extended coverage and 
explosion in amounts sufficient to prevent the Company or any Subsidiary from 
becoming a co-insurer and not in any event less than 80% of the insurable 
value of the property insured. The Company will maintain for itself and its 
Subsidiaries, with financially sound and reputable insurers, insurance 
against other hazards and risks and liability to persons and property to the 
extent and in the manner customary for companies in similar businesses 
similarly situated. All such policies of insurance shall be occurrence 
policies with "tail coverage" so-called respecting all prior "claims made" 
policies, all in a form reasonably satisfactory to the Purchasers. The 
Company shall give prompt written notice to the Purchasers and to insurers of 
loss or damage to the property and shall promptly file proof of loss with 
insurers.

         7.6  KEY PERSON LIFE INSURANCE.  The Company will use its best 
efforts to maintain or cause to be maintained, with financially sound and 
reputable insurers, term life insurance on the lives of Michael Feygin and 
Gary S. Moskovitz in the amount of $2,000,000 and on the lives of such other 
officers and employees of the Company and in such amounts as the Board may 
from time to time designate. Such policies shall be owned by the Company and 
all benefits thereunder shall be payable to the Company; provided, however, 
that at such time as the insured individual is no longer employed by the 
Company (except in the case of termination for cause), such individual may 
have the policy transferred to him upon payment to the Company of the 
pro-rated portion of premiums paid by the Company applicable to the remaining 
term of such policy.


                                      21
<PAGE>

         7.7  ACCOUNTS AND RECORDS.  The Company will keep true records and 
books of account in which full, true and correct entries will be made of all 
dealings or transactions in relation to its business and affairs in 
accordance with generally accepted accounting principles applied on a 
consistent basis.

         7.8  COMPLIANCE WITH REQUIREMENTS OF GOVERNMENTAL AUTHORITIES.  The 
Company shall duly observe and conform to all valid requirements of 
governmental authorities relating to the conduct of its businesses or to its 
property or assets the non-compliance with which would have a material 
adverse effect on the Company. Without limiting the generality of the 
foregoing, the Company will:

                  (a)  Comply with all minimum funding requirements 
applicable to any pension plans, employee benefit plans or employee 
contribution plans which are subject to ERISA or to the Internal Revenue Code 
of 1986, as amended (the "Code"), and comply in all other respects with the 
provisions of ERISA and the provisions of the Code applicable to such plans;

                  (b)  Comply with all applicable laws of the United States 
and of each applicable jurisdiction relating to equal employment opportunity, 
any rules, regulations, administrative orders and Executive Orders relating 
thereto and the applicable terms, relating to equal employment opportunity, 
of any contract, agreement or grant the Company has with, from or relating 
(by way of subcontract or otherwise) to any other contract, agreement or 
grant of, any federal or state governmental unit; and keep all records 
required to be kept, and file all reports, affirmative action plans and forms 
required to be filed, pursuant to any such applicable law or the terms of any 
such government contract; and

                  (c)  So conduct its business that neither the Company nor 
any property owned or occupied by the Company is in violation of any Federal 
or State Environmental Law of any sort or in violation of any Federal or 
State "OSHA" Law so-called.

         7.9   MAINTENANCE OF CORPORATE EXISTENCE, ETC.  The Company shall:

                  (a)  Maintain in full force and effect its corporate 
existence, rights, government approvals and franchises and all licenses and 
other rights to use patents, processes, licenses, trademarks, trade names or 
copyrights owned or possessed by it and deemed by the Company to be necessary 
and material to the conduct of its business.

                  (b)  Not transfer, assign or license any of its Listed 
Rights or Intellectual Property now owned or hereafter acquired by it without 
the written consent of the Purchasers holding two-thirds of the Shares (or 
Exchange Notes exchanged therefor), which consent the Purchasers may withhold 
in their reasonable discretion.

         7.10  AVAILABILITY OF COMMON STOCK FOR CONVERSION AND WARRANT 
EXERCISE.


                                      22
<PAGE>

         The Company will, from time to time, in accordance with the laws of 
the state of its incorporation, increase the authorized amount of Common 
Stock if at any time the number of shares of Common Stock remaining unissued 
and available for issuance shall be insufficient to permit the conversion of 
all the then outstanding shares of the Series A Preferred or the exercise of 
the Warrants.

         7.11  INVENTION AND SECRECY AGREEMENT.

                  (a)  The Company will make best efforts to enter into an 
Invention and Secrecy Agreement to the effect and in substantially the form 
of Exhibit C hereto or as otherwise approved by the Board with each person 
currently and hereafter employed by it with access to confidential 
information.

                  (b)  The Company will cause all technological developments, 
inventions, discoveries or improvements made by employees of the Company and 
its Subsidiaries in the course of their employment with the Company to be 
fully documented in engineering notebooks in accordance with the prevailing 
industrial professional standards, and where possible and appropriate, cause 
all employees to file and prosecute United States and foreign patent 
applications relating to and protecting such developments.

         7.12  USE OF PROCEEDS.  The Company will use the proceeds from the 
sale of the Shares for the purposes described in Section 3.17 hereof.

         7.13  COMPLIANCE BY SUBSIDIARIES.  The Company will cause any 
Subsidiary which it may now have and/or which it may organize or acquire in 
the future to comply fully with all the terms and provisions of this Section 
7 to the same extent as if such Subsidiary or Subsidiaries were the "Company" 
herein.

         7.14  EXPENSES OF BOARD MEMBERS.  The Company agrees to reimburse 
each of the directors elected to the Company's Board of Directors by the 
Purchasers for their reasonable out-of-pocket travel and living expenses in 
connection with attending Board of Directors' meetings and performing their 
respective obligations and responsibilities as directors of the Company.

         7.15  SECURITIES LAW FILINGS.  The Company will make any filings 
necessary to perfect in a timely fashion exemptions from (i) the registration 
and prospectus delivery requirements of the Securities Act, and (ii) the 
registration or qualification requirements of all applicable securities or 
blue sky laws of any state or other jurisdiction, for the issuance of the 
Shares to the Purchasers.

         7.16  PRO-FORMA FINANCIAL STATEMENTS.  The Company will make best 
efforts to furnish forecasts of hard orders and projected pro-forma financial 
statements, including balance sheets, income statements and cash flow 
statements, presented on a quarterly basis, on a twelve-month rolling basis. 
Such projected pro-forma financial statements shall be in form and substance 
acceptable to the holders of Series A Preferred. In the event that the 
Company does not supply such forecasts 


                                      23
<PAGE>

and pro-forma financial statements on a timely basis, the Company agrees to 
make the Company's records available and to make Company management available 
for consultation with the Purchasers and/or their agents or consultants in 
order that the Purchasers shall be able, at their own expense, to develop or 
complete such forecasts and financial statements. In the event that the 
Company wishes to use such forecasts and financial statements developed by 
the Purchasers, the Company and the Purchasers agree to negotiate in good 
faith with respect to a reasonable consulting fee therefor, and if such fee 
cannot be agreed upon, the Company agrees that it shall not make use of such 
forecasts or financial statements without the consent of the Purchasers.

         7.17  EXCHANGE NOTE.  If at any time twelve months from the date 
hereof, the Average Market Price (as defined in the Certificate) of the 
Company's Common Stock shall be less than two times the initial Conversion 
Price per share, upon the request of any Purchaser, the shares of Series A 
Preferred Stock held by such Purchaser (or any portion thereof as requested 
by the Purchaser) shall be exchanged by the Company for a convertible 
promissory note of the Company in the principal amount corresponding to the 
Purchaser's purchase price for such shares plus an annualized return on such 
purchase price from the date of purchase equal to 35%, plus all accrued 
dividends on such shares, bearing interest at 10% per annum (each, an 
"Exchange Note"). Equal payments of principal and interest shall be payable 
on the Exchange Notes quarterly over a two year period, commencing six months 
from the issuance of such Exchange Note. Any Exchange Note shall be 
convertible at the option of the holder into such number Common Stock as 
calculated by dividing the principal balance and accrued interest on such 
Exchange Note by the Conversion Price (as defined in the Certificate). The 
Exchange Notes shall contain covenants and terms of default no less favorable 
to such Purchaser than those typically found in commercial loans to 
businesses presenting a similar risk as the Company, but in no event shall 
such covenants be less favorable to the Purchaser than those contained herein 
and in accordance with the rights and privileges of the Series A Preferred 
Stock. All approval rights granted to the holders of the Series A Preferred 
Stock shall be granted to the Purchaser as the holder of an Exchange Note, 
including approval rights equivalent to the voting rights of the number of 
shares of Series A Preferred Stock exchanged for the Exchange Note. The 
Company shall covenant to ensure the continued election of the same number of 
members of the Board of Directors designated by the Purchasers as the 
Purchasers were entitled to prior to exercising their rights under this 
section. In the event that (1) the Company's right or ability to manufacture 
or sell its product in the United States, Europe or Japan is limited as a 
result of a determination that the Company is infringing on the intellectual 
property rights of any other person; (2) the claims under any of the patents 
listed on the Schedule of Exceptions are materially narrowed or invalidated; 
or (3) the Company is unable to obtain a line of credit of at least $650,000 
from a commercial bank acceptable to Telantis Venture Partners V, Inc. by 
October 31, 1998, then regardless of the Average Market Price at the time of 
such occurrence, any Purchaser shall have the right to exercise its rights 
under this section, provided, however, that under such circumstance, the 
Exchange Notes issued shall be payable on demand.

         7.18  LINE OF CREDIT.  The Company shall obtain a line of credit of 
not less than $650,000 from a commercial bank acceptable to Telantis Venture 
Partners V, Inc. by October 31, 1998.
                                      
                                  SECTION 8


                                      24
<PAGE>

                              NEGATIVE COVENANTS

         The Company agrees that, so long as any Purchaser is a Holder of 
Restricted Securities or Exchange Notes the Company (and each of its 
Subsidiaries unless the context otherwise requires) will not do any of the 
following without the approval of 75% of the Board (unless such other 
requirement is set forth below):

         8.1  SALE/PURCHASE OF ASSETS; MERGER.  Without the written consent 
of the holders of 50% in interest of the Restricted Securities and Exchange 
Notes, hereafter:

                  (a)  Sell or otherwise dispose of the capital stock of any 
Subsidiary or of all or a substantial part of the Company's assets or 
business or of all or a substantial part of the assets or business of any 
Subsidiary (whether by sale of assets, exclusive license or otherwise);

                  (b)  Purchase or otherwise acquire capital stock of any 
corporation or equity interest in any other entity or lend money to any 
person or entity or purchase a substantial part of the operating assets of 
any person or entity; or

                  (c)  Consolidate with or merge into or with any other 
person or entity or permit any other person or entity to consolidate with or 
merge into it (except that a 100% Subsidiary may consolidate with or merge 
into the Company or another 100% Subsidiary); provided that the foregoing 
restriction does not apply to the merger of another corporation into the 
Company, if:

                           (i)  The Company is the surviving corporation and 
         more than 50% of the outstanding common stock of the surviving 
         corporation is owned by persons who prior to such merger owned
         Common Stock of the Company;

                          (ii)  After giving effect to the proposed merger or
         consolidation the surviving corporation will be engaged in 
         substantially the same lines of business; and

                         (iii)  Immediately after the consummation of the
         transaction, and after giving effect thereto, no default under this
         Agreement or any Financing Document would exist.

         8.2  FUTURE REGISTRATION RIGHTS.  Except as expressly permitted by 
this Agreement and except for an underwriting agreement between the Company 
and one or more professional underwriters of securities, the Company shall 
not agree to register any Equity Securities under the Securities Act with any 
rights senior to, or on a pari passu basis with, the Purchasers. Without 
limiting the foregoing, if the Company, after receiving the approval required 
under this section, grants registration rights to any other person, the 
Company shall give notice thereof and provide a copy of the agreement 
containing such registration rights to the Purchasers. If any Purchaser, in 
its sole discretion, determines that the rights granted to the other person 
are senior to the rights held by the Purchaser ("Senior Rights"), such 
Purchaser may elect the Senior Rights by providing the Company with notice of 
such election within 30 days of its receipt of notice from the Company. Upon 
such 


                                      25
<PAGE>

notification, the Company shall enter into an agreement with such Purchaser 
granting such Purchaser the Senior Rights.

         8.3  PRIVATE OFFERINGS.  Except in a public offering registered 
under the Securities Act, issue or sell any Equity Security unless each 
issuer and purchaser agrees in writing with the Company not to effect any 
public sale or distribution of any such Equity Security during the ten (10) 
business days prior to and the ninety (90) calendar days after the 
effectiveness of any underwritten registration of securities of the Company, 
except as part of such underwritten registration if otherwise permitted.

         8.4  CHANGES IN TYPE OF BUSINESS.  So long as any Shares or Exchange 
Notes remain outstanding, make any substantial change in the character of its 
business.

         8.5  LOANS, GUARANTEES.  Make any loan or advance to any person or 
entity in excess of $100,000 in the aggregate, including, without limitation, 
any employee or director of the Company or any Subsidiary, except advances 
for travel and entertainment expenses, relocation costs and similar 
expenditures in the ordinary course of business or under the terms of an 
employee stock option plan or stock purchase agreement approved by the Board; 
or guarantee, directly or indirectly, any Indebtedness except for trade 
accounts of the Company or any Subsidiary arising in the ordinary course of 
business.

         8.6  ISSUANCE OF EQUITY SECURITIES.  Hereafter issue, sell, grant or 
award or enter into any agreement or adopt any plan to issue, sell, grant or 
award any Equity Security or option to acquire any Equity Security except to 
management, directors and employees of, and consultants to, the Company in 
compliance with Section 2.2 or Section 8.14 hereof. Without limiting the 
foregoing, if the Company intends to sell any Equity Security to any other 
person, the Company shall give notice thereof and provide a copy of the 
documents pertaining to the sale and defining the rights and privileges of 
such Equity Security to the Purchasers. If any Purchaser, in its sole 
discretion, determines that the terms attendant to the sale of such Equity 
Security or the rights and privileges of such Equity Security are preferable 
to the rights held by the Purchaser ("Preferred Securities"), such Purchaser 
may elect to exchange the securities purchased hereunder for Preferred 
Securities, with all rights, privileges and terms of sale attendant thereto, 
by providing the Company with notice of such election within 30 days of its 
receipt of notice from the Company. Upon such notification, the Company shall 
enter into all necessary agreements with such Purchaser to exchange the 
securities purchased hereunder for such amount of Preferred Securities as 
would have a sale price equivalent to the greater of (i) the purchase price 
paid by the Purchaser hereunder or (ii) the Fair Market Value of the 
securities purchased hereunder at the time of such exchange. The "Fair Market 
Value" at any date of the securities purchased hereunder shall equal the sum 
of (i) the Current Market Price (as defined in the Certificate) of one share 
of Common stock multiplied by the sum of (w) the number of shares of Common 
Stock into which the Shares held by the Purchaser are then convertible and 
(x) the number of shares of Common Stock for which the Warrant held by the 
Purchaser would be exercisable in a cashless exercise and (ii) the greater of 
(y) the principal and accrued interest owing on any Exchange Note held by the 
Purchaser or (z) the Current Market Price multiplied by the number of shares 
of Common Stock into which such Exchange Note is then convertible.


                                      26
<PAGE>

         8.7  PURCHASE OF EQUITY SECURITIES.  Directly or indirectly redeem, 
purchase or otherwise acquire, or permit any Subsidiary to redeem, purchase 
or otherwise acquire, any of the Company's Equity Securities except as 
permitted by this Agreement, the Shareholders' Agreement, the Certificate or 
any agreement with management, directors and employees of, and consultants 
to, the Company in accordance with Section 8.14.

         8.8  CONFLICTING AGREEMENTS.  Without the written consent of the 
holders of 75% in interest of the Restricted Securities and Exchange Notes, 
become subject to, or permit any of its Subsidiaries to become subject to, 
any agreement or instrument, which by its terms would (under any 
circumstances) restrict the Company's right to perform any of its obligations 
pursuant to the terms of this Agreement or any agreement contemplated hereby, 
the Certificate, the Financing Documents, or the Company's By-laws 
(including, without limitation, all obligations relating to payment of 
dividends on and making redemptions of the Series A Preferred and conversions 
of the Series A Preferred).

         8.9  AMENDMENT OF CHARTER DOCUMENTS.  Without the written consent of 
the holders of 75% in interest of the Restricted Securities and Exchange 
Notes, except as contemplated by this Agreement, make any amendment to the 
Company's Certificate of Incorporation or By-laws, or file any resolution of 
the Board with the Secretary of State of the State of Delaware containing any 
provisions which would adversely affect or otherwise impair the rights of the 
holders of the Series A Preferred, the Conversion Shares, the Warrants or the 
Warrant Shares under this Agreement, the Certificate or the Company's By-laws.

         8.10  RELATED PARTY TRANSACTIONS.  Enter into, or permit any 
Subsidiary to enter into, any transaction with any Related Party or any of 
its or any Subsidiary's Affiliates, except as otherwise expressly 
contemplated by this Agreement or disclosed in the SEC Documents.

         8.11  SUBSIDIARIES.  Establish or acquire (a) any Subsidiaries other 
than wholly-owned Subsidiaries, or (b) any Subsidiaries organized outside of 
the United States and its territorial possessions.

         8.12  BUSINESS PLAN.  Adopt a new plan or make any material changes 
in the plan or the Company's and its Subsidiaries operation of the Company's 
business as set forth in the Confidential Information Memorandum and that 
certain Summary Plan of Restructure and Growth dated April 30, 1998 (the 
"Restructuring Memorandum").

         8.13  AMENDMENT OF OTHER AGREEMENTS.  Without the written consent of 
the holders of 75% in interest of the Restricted Securities and Exchange 
Notes, amend, modify or waive any provision of any of the Financing 
Documents, fail to enforce the provisions of any of the Financing Documents 
or avail itself of all rights and remedies thereunder.


                                      27
<PAGE>

         8.14  EMPLOYEE STOCK PLANS.  Hereafter issue, sell, grant or award 
any Equity Security or any option to acquire any Equity Security to 
employees, consultants or advisors to the Company, provided, however, that 
the Company may issue, sell grant or award any Equity Security or option to 
acquire any Equity Security under the Company's Employee Stock Purchase Plan 
or the Company's 1995 Stock Incentive Plan, in each case as existing on the 
date hereof.

         8.15  LIENS.  Create, assume or permit, or permit any Subsidiary to 
create, assume or permit, any Lien upon any of its properties or assets, 
whether now owned or hereafter acquired, except (a) Liens existing as of the 
date hereof as disclosed in Section 3.7 hereof, (b) any Lien on any asset of 
a corporation existing at the time such corporation is merged into or 
consolidated with the Company and not created in contemplation of such event, 
(c) any Lien existing on any asset prior to the acquisition thereof by the 
Company and not created in contemplation of such event, (d) any Lien created 
on any real property or equipment in connection with the leasing of such real 
property or equipment, (e) Permitted Liens, and (f) such Liens as are 
approved by a majority of the Board.

         8.16  EXECUTIVE COMPENSATION.  (a) Pay or provide annual aggregate 
cash and noncash compensation in excess of a base salary of $250,000 and 
incentive compensation of $500,000 (including, in each case, any form of 
personal benefit or property and including any compensation which has been 
earned by payment or which has been deferred, but excluding compensation 
pursuant to group life, health, hospitalization, medical or dental 
reimbursement or relocation plans that do not discriminate in scope, terms or 
operation in favor of officers, directors or key employees of the Company and 
that are available generally to all salaried employees), or (b) otherwise fix 
the compensation of, or grant compensation to, any key employee of the 
Company or any Subsidiary..

         8.17  INVESTMENTS.  Own, purchase or acquire any stock, obligations 
or securities of, or any interest in, or make any capital contribution to, 
any other Person, or own, purchase or acquire any property not used in the 
usual and ordinary course of business, except that the Company or any 
Subsidiary may (a) own, purchase or acquire certificates of deposit in or 
repurchase agreements from United States commercial banks having capital 
resources in excess of $100,000,000 and obligations of the United States 
Government or any agency thereof and obligations guaranteed by the United 
States Government, (b) invest in commercial paper rated at least Prime 1 by 
Moody's Industrial Manual, (c) deposit funds in money market accounts in 
financial institutions having capital resources in excess of $100,000,000, 
and (d) make such investments as are approved by a majority of the Board.

         8.18  PURCHASES AND SALES.  Hereafter, except as contemplated by the 
Annual Budget:

                  (a)  other than normal operating expenditures made as a 
part of the ordinary course of the Company's business, purchase, directly or 
indirectly, any item (or group of items) of real or personal property which 
has a purchase price in excess of $10,000 or enter into any other transaction 
with respect to such item (or group of items) which, under generally accepted 
accounting principles is or should be treated as a purchase or capital 
expenditure for accounting purposes; or

                                      28
<PAGE>

                  (b)  increase the compensation of any person listed in part 
3.16 of the Schedule of Exceptions and will not compensate any other officer, 
director or employee at an annual rate of $50,000 per year or more.

         8.19  LEASES.  Enter into any leases or other rental agreements 
(excluding capitalized leases) that are not within the scope of an Annual 
Budget, except for leases of personal property within the ordinary course of 
the Company's business and not exceeding $25,000 in the aggregate. The 
Company shall obtain the consent of the holders of 75% in interest of the 
Restricted Securities and Exchange Notes held by the Purchasers if the value 
of such leases exceeds $100,000 in the aggregate.

         8.20  INDEBTEDNESS.  Create, incur, issue, assume, guarantee or 
otherwise become or remain directly or indirectly liable for, or permit any 
Subsidiary to create, incur, issue, assume, guarantee or otherwise become or 
remain directly or indirectly liable for, any Indebtedness in excess of 
$100,000 in the aggregate (other than a credit line for trade receivables of 
up to $1,000,000 (the "Trade Receivables Credit Line"). The Company shall 
obtain the consent of the holders of 75% in interest of the Restricted 
Securities and Exchange Notes held by the Purchasers if the aggregate of any 
such additional indebtedness (exclusive of the Trade Receivables Credit Line) 
exceeds $1,500,000 in the aggregate.

         8.21  COMPLIANCE BY SUBSIDIARIES.  The Company will cause any 
Subsidiary which it may now have and/or which it may organize or acquire in 
the future to comply with all the terms and provisions of this Section 8 to 
the same extent as if such Subsidiary were the "Company" herein.
                                       
                                   SECTION 9

               RESTRICTIONS ON TRANSFERABILITY OF SECURITIES; 
                       COMPLIANCE WITH SECURITIES ACT

         9.1  RESTRICTIONS ON TRANSFERABILITY.  None of the Shares, the 
Conversion Shares, the Warrants or the Warrant Shares shall be transferable, 
except upon the conditions specified in this Section 9, which conditions are 
intended to insure compliance with the provisions of the Securities Act or, 
in the case of Section 9.15 hereof, to assist in an orderly distribution of 
the Company's securities. Each Purchaser will cause any proposed transferee 
of Shares, Conversion Shares, Warrants or Warrant Shares held by such 
Purchaser to agree to take and hold those securities subject to the 
provisions and upon the conditions specified in this Section 9.

         9.2  CERTAIN DEFINITIONS.  As used in this Section 9, the following 
terms shall have the following respective meanings:

         "Commission" shall mean the Securities and Exchange Commission or 
any other federal agency at the time administering the Securities Act.

         "Restricted Securities" shall mean the securities of the Company 
required to bear or bearing the legend set forth in Section 9.3 hereof.


                                      29

<PAGE>

         "Registrable Securities" shall mean, from time to time (i) the 
Conversion Shares and the Warrant Shares less any Conversion Shares and 
Warrant Shares theretofore sold to the public, and (ii) any shares of Common 
Stock issued as dividends on the Shares.

         The terms "register," "registered" and "registration" shall refer to 
a registration effected by preparing and filing a registration statement in 
compliance with the Securities Act and applicable rules and regulations 
thereunder, and the effectiveness of such registration statement.

         "Registration Expenses" shall mean all expenses incurred by the Company
in compliance with Sections 9.5, 9.6 and 9.7 hereof, including, without
limitation, all registration and filing fees, printing expenses, fees and
disbursements of counsel for the Company and one special counsel for all Holders
chosen by the Holders of a majority of the securities included in such
registration, blue sky fees and expenses, and the expense of any special audits
incident to or required by any such registration (but excluding the compensation
of regular employees of the Company, which shall be paid in any event by the
Company).

         "Selling Expenses" shall mean all underwriting discounts and selling
commissions applicable to the sale of Registrable Securities, and all fees and
disbursements of counsel for any Holder.

         "Holder" shall mean any holder of outstanding Shares or Registrable
Securities which have not been sold to the public or any transferee thereof,
where the transfer is made in compliance with the provision of Section 9.14.

         "Initiating Holders" shall mean any Purchasers (or their assignees
under Section 9.14 hereof) who in the aggregate are Holders of not less than
fifty percent (50%) of the Registrable Securities, and, after any other Holder
or Holders have joined in a request by Initiating Holders, shall include such
other Holder or Holders.

         "Other Shareholders" shall have the meaning set forth in
Section 9.5(b).

         9.3 RESTRICTIVE LEGEND. Each certificate representing (i) the Shares,
or (ii) Conversion Shares, or (iii) the Warrants, or (iv) the Warrant Shares, or
(v) any other securities issued in respect of the Series A Preferred or the
Conversion Shares, the Warrants or the Warrant Shares upon any stock split,
stock dividend, recapitalization, merger, consolidation or similar event, shall
(unless otherwise permitted or unless the securities evidenced by such
certificate shall have been registered under the Securities Act) be stamped or
otherwise imprinted with a legend substantially in the following form (in
addition to any legend required under applicable state securities laws):

         THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES 
         ACT OF 1933 OR ANY STATE SECURITIES LAWS. THEY MAY NOT BE SOLD 
         OR OFFERED FOR SALE IN THE ABSENCE OF AN EFFECTIVE REGISTRATION 
         STATEMENT AS TO THE SECURITIES UNDER SAID ACT AND ANY APPLICABLE 
         STATE SECURITIES LAW OR THE 


                                    30
<PAGE>


         AVAILABILITY OF AN EXEMPTION FROM REGISTRATION UNDER SAID ACT.

         Upon request of a holder of such a certificate, the Company shall
remove the foregoing legend from the certificate or issue to such holder a new
certificate therefor free of any transfer legend, if with such request, the
Company shall have received either the opinion referred to in Section 9.4(a)(i)
or the "no-action" letter referred to in Section 9.4(a)(ii), to the effect that
any transfer by such holder of the securities evidenced by such certificate will
not violate the Securities Act and applicable state securities laws.

         9.4 NOTICE OF PROPOSED TRANSFERS AND SECURITIES ACT COMPLIANCE.

                  (a) The holder of Restricted Securities by acceptance 
thereof agrees to comply in all respects with the provisions of this Section 
9.4. Prior to any proposed transfer of any Restricted Securities (other than 
under circumstances described in Sections 9.5, 9.6 and 9.7 hereof), the 
holder thereof shall give written notice (or oral notice in the case of 
transactions in compliance with Rule 144) to the Company of such holder's 
intention to effect such transfer. Each such notice shall describe the manner 
and circumstances of the proposed transfer in sufficient detail, and shall be 
accompanied (except in transactions in compliance with Rule 144 or transfers 
to Affiliates) by either (i) a written opinion of Day, Berry & Howard LLP or 
other legal counsel (including counsel for the holder who also may be an 
employee of the holder) who shall be reasonably satisfactory to the Company, 
addressed to the Company and reasonably satisfactory in form and substance to 
the Company's counsel, to the effect that the proposed transfer of the 
Restricted Securities may be effected without registration under the 
Securities Act and applicable state securities laws, or (ii) a "no-action" 
letter from the Commission to the effect that the distribution of such 
securities without registration will not result in a recommendation by the 
staff of the Commission that action be taken with respect thereto. Upon 
receipt by the Company of such notices and accompanying opinion or 
"no-action" letter, if required, the holder of such Restricted Securities 
shall be entitled to transfer such Restricted Securities in accordance with 
the terms of the notice delivered by the holder to the Company. Each 
certificate evidencing the Restricted Securities transferred as above 
provided shall bear the appropriate restrictive legend set forth in Section 
9.3 above, except that such certificate need not bear such restrictive legend 
if such legend is no longer required if the opinion of counsel or "no-action" 
letter referred to above is to the further effect that such legend is not 
required in order to establish compliance with any provisions of the 
Securities Act or applicable state securities laws or if the transaction is 
made, to the Company's reasonable satisfaction, in compliance with Rule 144.

                  (b) With a view to making available the benefits of certain
rules and regulations of the Commission and applicable state securities laws
which may permit the sale of the Restricted Securities without registration, the
Company agrees to (i) make available to the holder of Restricted Securities and
any proposed transferee current financial and other information about the
Company (it being agreed that current filings pursuant to the Exchange Act shall
fulfill this requirement), and (ii) use its best efforts to otherwise cooperate
with such holder and such transferee, all as may be reasonably required by such
holder or proposed transferee.


                                     31
<PAGE>


         9.5 REQUESTED REGISTRATION.

                  (a) REQUEST FOR REGISTRATION. If at any time the Company shall
receive from Initiating Holders a written request that the Company effect a
registration with respect to all or a part of the Registrable Securities, the
Company will, without limiting any other rights under this Section 9:

                           (i) promptly give written notice of the proposed
         registration to all other Holders; and

                           (ii) as soon as practicable, use its commercially
         reasonable best efforts to effect such registration (including, without
         limitation, the execution of an undertaking to file post-effective
         amendments, appropriate qualification under applicable blue sky or
         other state securities laws and appropriate compliance with applicable
         regulations issued under the Securities Act) as may be so requested and
         as would permit or facilitate the sale and distribution of all or such
         portion of such Registrable Securities as are specified in such
         request, together with all or such portion of the Registrable
         Securities of any Holder or Holders joining in such request as are
         specified in a written request given by such Holder or Holders within
         thirty (30) days after receipt of such written notice from the Company;
         provided that the Company shall not be obligated to effect, or to take
         any action to effect, any such registration pursuant to this Section
         9.5 if the request for registration does not request the registration
         of Registrable Securities equal to not less than 25% of the number of
         the shares of Common Stock issuable upon conversion of all of the
         Series A Preferred Stock issued by the Company pursuant to this
         Agreement (including shares issued pursuant to Section 2.2 hereof).

         Subject to subsection 9.5(a)(ii), the Company shall file a registration
statement covering the Registrable Securities so requested to be registered as
soon as practicable after receipt of the request or requests of the Initiating
Holders.

         The registration statement filed pursuant to the request of the
Initiating Holders may, subject to the provisions of subsection 9.5(b) below,
include other securities of the Company which are held by officers or directors
of the Company or which are held by parties who, by virtue of agreements with
the Company, are entitled to include their securities in any such registration.

                  (b) UNDERWRITING. If the Initiating Holders intend to
distribute the Registrable Securities covered by their request by means of an
underwriting, they shall so advise the Company as a part of their request made
pursuant to this Section 9.5 and the Company shall include such information in
the written notice referred to in subsection 9.5(a)(i) above. The right of any
Holder to registration pursuant to this Section 9.5 shall be conditioned upon
such Holder's participation in such underwriting and the inclusion of such
Holder's Registrable Securities in the underwriting (unless 


                                     32
<PAGE>


otherwise mutually agreed by a majority in interest of the Initiating Holders 
and such Holder) to the extent provided herein.

         If officers or directors of the Company holding other securities of the
Company shall request inclusion in any registration pursuant to this Section
9.5, or if holders of securities of the Company who are entitled, by contract
with the Company, to have securities included in such registration (the "Other
Shareholders") request such inclusion, the Initiating Holders shall, on behalf
of all Holders, offer to include the securities of such officers, directors and
Other Shareholders in the underwriting and may condition such offer on their
acceptance of all applicable provisions of this Section 9. The Company shall
(together with all Holders, officers, directors and Other Shareholders proposing
to distribute their securities through such underwriting) enter into an
underwriting agreement in customary form with the representative of the
underwriter or underwriters selected for such underwriting by a majority in
interest of the Initiating Holders and reasonably acceptable to the Company.

         Notwithstanding any other provision of this Section 9.5, if the 
representative of the underwriter or underwriters advises the Initiating 
Holders in writing that marketing factors make it advisable to impose a 
limitation on the number of shares to be underwritten, the securities of the 
Company (other than Registrable Securities) held by officers or directors of 
the Company and by Other Shareholders shall be excluded from such 
registration to the extent so required by such limitation and if a limitation 
of the number of shares is still required, the Initiating Holders shall so 
advise all Holders of Registrable Securities whose securities would otherwise 
be underwritten pursuant hereto, and the number of shares of Registrable 
Securities that may be included in the registration and underwriting shall be 
allocated among all such Holders in proportion, as nearly as practicable, to 
the respective amounts of Registrable Securities held by such persons at the 
time of filing the registration statement. No Registrable Securities or any 
other securities excluded from the underwriting by reason of the 
underwriter's marketing limitation shall be included in such registration.

         If any Holder of Registrable Securities, officer, director or Other
Shareholder above disapproves of the terms of the underwriting, such party may
elect to withdraw therefrom by written notice to the Company, the underwriter
and the Initiating Holders. The securities so withdrawn shall also be withdrawn
from registration.

         If the underwriter has not limited the number of Registrable Securities
or other securities to be underwritten, the Company may include its securities
for its own account in such registration if the underwriter so agrees and if the
number of Registrable Securities and other securities which would otherwise have
been included in such registration and underwriting will not thereby be limited.

         9.6 COMPANY REGISTRATION.

                  (a) NOTICE OF REGISTRATION. If the Company shall determine to
register any of its securities either for its own account or the account of a
security holder or holders exercising their respective demand registration
rights, other than a registration relating solely to employee benefit 


                                    33
<PAGE>


plans, or a registration relating solely to a Commission Rule 145 
transaction, or a registration on any registration form which does not permit 
secondary sales, the Company will:

                           (i) promptly give to each Holder written notice
         thereof (which shall include a list of the jurisdictions in which the
         Company intends to attempt to qualify such securities under the
         applicable blue sky or other state securities laws); and

                           (ii) include in such registration (and any related
         qualification under blue sky laws or other compliance), and in any
         underwriting involved therein, all the Registrable Securities specified
         in a written request or requests, made by any Holder within fifteen
         (15) days after receipt of the written notice from the Company
         described in clause (i) above, except as set forth in subsection 9.6(b)
         below.

                  (b) UNDERWRITING. If the registration of which the Company 
gives notice is for a registered public offering involving an underwriting, 
the Company shall so advise the Holders as part of the written notice given 
pursuant to subsection 9.6(a)(i). In such event, the right of any Holder to 
registration pursuant to Section 9.6 shall be conditioned upon such Holder's 
participation in such underwriting and the inclusion of such Holder's 
Registrable Securities in the underwriting to the extent provided herein. All 
Holders proposing to distribute their securities through such underwriting 
shall (together with the Company, directors and officers and the Other 
Shareholders distributing their securities through such underwriting) enter 
into an underwriting agreement in customary form with the underwriter or 
underwriters selected for underwriting by the Company.

         Notwithstanding any other provision of this Section 9.6, if the
underwriter determines that marketing factors require a limitation on the number
of shares to be underwritten, the underwriter may (subject to the allocation
priority set forth below) exclude from such registration and underwriting some
or all of the Registrable Securities which would otherwise be underwritten
pursuant hereto. The Company shall so advise all holders of securities
requesting registration, and the number of shares of securities that are
entitled to be included in the registration and underwriting shall be allocated
in the following manner: The number of shares that may be included in the
registration and underwriting on behalf of such Holders, directors and officers
and Other Shareholders shall be allocated among such Holders, directors and
officers and Other Shareholders in proportion, as nearly as practicable, to the
respective amounts of Registrable Securities and other securities held by such
persons at the time of filing the registration statement.

         If any Holder of Registrable Securities or any officer, director or
Other Shareholder disapproves of the terms of any such underwriting, such party
may elect to withdraw therefrom by written notice to the Company and the
underwriter. Any Registrable Securities or other securities excluded or
withdrawn from such underwriting shall be withdrawn from such registration.

         9.7 REGISTRATION ON FORM S-2 OR FORM S-3.  The Company shall
use its best efforts to qualify for the use of Form S-2 and Form S-3 or 
any comparable or successor form or forms of the Commission; and to that
end the Company shall maintain its registration (whether or not required by 


                                   34
<PAGE>


law to do so) of the Common Stock under the Exchange Act, in accordance with 
the provisions of the Exchange Act. After the Company has qualified for the 
use of either Form S-2 or Form S-3, or both, in addition to the rights 
contained in the foregoing provisions of this Section 9, the Holders of 
Registrable Securities shall have the right to request registrations on Form 
S-2 or Form S-3 (by written request stating the number of shares of 
Registrable Securities to be disposed of and the intended method of 
disposition of such shares by such Holder or Holders), subject only to the 
following:

                           (i) No request made under this Section 9.7 shall
         require a registration statement requested therein to become effective
         (a) prior to ninety (90) days after the effective date of a
         registration statement filed by the Company covering a firm commitment
         underwritten public offering of Common Stock, or (b) prior to ninety
         (90) days after the effective date of a registration statement referred
         to in (a) above if the Company shall theretofore have given written
         notice of such registration statement to the Holders of Registrable
         Securities pursuant to subsection 9.5(a) or 9.6(a) and shall have
         thereafter pursued the preparation, filing and effectiveness of such
         registration statement with diligence; and

                           (ii) The Company shall not be required to effect a
         registration pursuant to this paragraph 9.7 unless the Registrable
         Securities requested to be registered pursuant to this paragraph 9.7
         have a proposed public offering price of $2,000,000 or more;

         The Company shall give notice to all Holders of Registrable Securities
of the receipt of a request for registration pursuant to this Section 9.7 and
shall provide a reasonable opportunity for other Holders to participate in the
registration, and, if the intended method of disposition specified as aforesaid
is an underwritten public offering, participation by the Company and other
holders of Common Stock shall be on the basis set forth in Section 9.5(b) above.
Subject to the foregoing, the Company will use its commercially reasonable
efforts to effect promptly the registration of all shares of Registrable
Securities on Form S-2 or Form S-3 to the extent requested by the Holder or
Holders thereof for purposes of disposition.

         9.8 EXPENSES OF REGISTRATION. The Company shall bear all Registration
Expenses incurred in connection with any registration, qualification and
compliance by the Company pursuant to Sections 9.5, 9.6 and 9.7 hereof. All
Selling Expenses shall be borne by the holders of the securities so registered
pro rata on the basis of the number of their shares so registered.

         9.9 REGISTRATION PROCEDURES. In the case of each registration effected
by the Company pursuant to this Section 9, the Company will keep each Holder
advised in writing as to the initiation of each registration and as to the
completion thereof. Except as provided in Section 9.7, at its expense, the
Company will:

                  (a) keep such registration effective for a period of one 
hundred twenty (120) days or until the Holder or Holders have completed the 
distribution described in the registration statement 


                                   35
<PAGE>


relating thereto, whichever first occurs, provided, however, that such 
120-day period shall be extended for a period of time equal to the period the 
Holder refrains from selling any securities included in such registration in 
accordance with the provisions of Section 9.15 hereof;

                  (b) furnish such number of prospectuses and other documents
incident thereto as a Holder from time to time may reasonably request; and

                  (c) use its best efforts to register or qualify the
Registrable Securities under the securities or blue-sky laws of such
jurisdictions as any Holder may request; PROVIDED, HOWEVER, that the Company
shall not be obligated to register or qualify such Registrable Securities in any
particular jurisdiction in which the Company would be required to execute a
general consent to service of process in order to effect such registration,
qualification or compliance, unless the Company is already subject to service in
such jurisdiction and except as may be required by the Securities Act or
applicable rules or regulations thereunder.

         9.10 INDEMNIFICATION AND CONTRIBUTION.

                  (a) The Company, with respect to each registration,
qualification and compliance effected pursuant to this Section 9, will indemnify
and hold harmless each Holder, each of its officers, directors and partners, and
each party controlling such Holder, and each underwriter, if any, and each party
who controls any underwriter, against all claims, losses, damages and
liabilities (or actions in respect thereof) arising out of or based on any
untrue statement (or alleged untrue statement) of a material fact contained in
any prospectus, offering circular or other document (including any related
registration statement, notification or the like) incident to any such
registration, qualification or compliance, or based on any omission (or alleged
omission) to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, or any violation by the
Company of the Securities Act or any rule or regulation thereunder applicable to
the Company and relating to action or inaction required of the Company in
connection with any such registration, qualification or compliance, and will
reimburse each such Holder, each of its officers, directors and partners, and
each party controlling such Holder, each such underwriter and each party who
controls any such underwriter, for any legal and any other expenses incurred in
connection with investigating or defending any such claim, loss, damage,
liability or action, provided that the Company will not be liable in any such
case to the extent that any such claim, loss, damage, liability or expense
arises out of or is based on any untrue statement or omission based solely upon
written information furnished to the Company by such Holder or underwriter, as
the case may be, and specifically for use therein.

                  (b) Each Holder and Other Shareholder will, if Registrable
Securities held by such party are included in the securities as to which such
registration, qualification or compliance is being effected, indemnify and hold
harmless the Company, each of its directors and officers and each underwriter,
if any, of the Company's securities covered by such a registration statement,
each party who controls the Company or such underwriter, each other such Holder
and Other Shareholder and each of their respective officers, directors and
partners, and each party controlling such Holder or Other Shareholder, against
all claims, losses, damages and liabilities (or actions in respect thereof)


                                     36
<PAGE>


arising out of or based on any untrue statement (or alleged untrue statement) of
a material fact contained in any such registration statement, prospectus,
offering circular or other document, or any omission (or alleged omission) to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, and will reimburse the Company and such
Holders, Other Shareholders, directors, officers, partners, parties,
underwriters or control persons for any legal or any other expenses reasonably
incurred in connection with investigating or defending any such claim, loss,
damage, liability or action, in each case to the extent, but only to the extent,
that such untrue statement (or alleged untrue statement) or omission (or alleged
omission) is made in such registration statement, prospectus, offering circular
or other document solely in reliance upon and in conformity with written
information furnished to the Company by such Holder or Other Shareholder and
specifically for use therein; PROVIDED, HOWEVER, that the obligations of such
Holders and Other Shareholders hereunder shall be limited to the lesser of: (i)
an amount equal to the proceeds to each such Holder or Other Shareholder of
securities sold as contemplated herein, or (ii) an amount equal to the
proportion of such claims, losses, damages and liabilities as the proceeds to
each such Holder or Other Shareholder of securities sold pursuant to such
offering bears to the total proceeds of such offering.

                  (c) Each party entitled to indemnification under this 
Section 9.10 (the "Indemnified Party") shall give notice to the party 
required to provide indemnification (the "Indemnifying Party") promptly after 
such Indemnified Party has actual knowledge of any claim as to which 
indemnity may be sought, and shall permit the Indemnifying Party to assume 
the defense of any such claim or any litigation resulting therefrom, provided 
that counsel for the Indemnifying Party, who shall conduct the defense of 
such claim or any litigation resulting therefrom, shall be approved by the 
Indemnified Party (whose approval shall not unreasonably be withheld), and 
the Indemnified Party may participate in such defense at such party's expense 
(unless the Indemnified Party shall have been advised by counsel that actual 
or potential differing interests or defenses exist or may exist between the 
Indemnifying Party and the Indemnified Party, in which case any such expense, 
to the extent it is reasonable, shall be paid by the Indemnifying Party), and 
provided further that the failure of any Indemnified Party to give notice as 
provided herein shall not relieve the Indemnifying Party of its obligations 
under this Section 9. No Indemnifying Party, in the defense of any such claim 
or litigation, shall, except with the consent of each Indemnified Party, 
consent to entry of any judgment or enter into any settlement which does not 
include as an unconditional term thereof the giving by the claimant or 
plaintiff to such Indemnified Party of a release from all liability in 
respect to such claim or litigation.

                  (d) In order to provide for just and equitable contribution to
joint liability under the Securities Act in any case in which either (i) any
holder of Restricted Securities exercising rights under this Agreement, or any
controlling person of any such holder, makes a claim for indemnification
pursuant to this Section 9.10 but it is judicially determined (by the entry of a
final judgment or decree by a court of competent jurisdiction and the expiration
of time to appeal or the denial of the last right of appeal) that such
indemnification may not be enforced in such case notwithstanding the fact that
this Section 9.10 provides for indemnification in such case, or (ii)
contribution under the Securities Act may be required on the part of any such
selling holder or any such controlling person in 


                                       37
<PAGE>


circumstances for which indemnification is provided under this Section 9.10; 
then, and in each such case, the Company and such holder will contribute to 
the aggregate losses, claims, damages or liabilities to which they may be 
subject (after contribution from others) in such proportion so that such 
holder is responsible for the portion represented by the percentage that the 
public offering price of its Restricted Securities offered by the 
registration statement bears to the public offering price of all securities 
offered by such registration statement, and the Company is responsible for 
the remaining portion; PROVIDED, HOWEVER, that, in any such case, (a) no such 
holder will be required to contribute any amount in excess of the public 
offering price of all such Restricted Securities offered by it pursuant to 
such registration statement; and (b) no person or entity guilty of fraudulent 
misrepresentation (within the meaning of Section 11(f) of the Securities Act) 
will be entitled to contribution from any person or entity who was not guilty 
of such fraudulent misrepresentation.

         9.11 INFORMATION BY HOLDER. Each Holder of Registrable Securities, and
each Other Shareholder holding securities included in any registration, shall
furnish to the Company such information regarding such Holder or Other
Shareholder as the Company may reasonably request in writing and as shall be
reasonably required in connection with any registration, qualification or
compliance referred to in this Section 9.

         9.12 LIMITATIONS ON REGISTRATION OF ISSUES OF SECURITIES. From and 
after the date of this Agreement, the Company shall not enter into any 
agreement with any holder or prospective holder of any securities of the 
Company giving such holder or prospective holder the right to require the 
Company to initiate any registration of any securities of the Company; 
PROVIDED that this Section 9.12 shall not limit the right of the Company to 
enter into any agreements with any holder or prospective holder of any 
securities of the Company giving such holder or prospective holder the right 
to require the Company, upon any registration of any of its securities, to 
include, among the securities which the Company is then registering, 
securities owned by such holder and PROVIDED FURTHER that the Board may waive 
the requirement that the Company not enter into any agreement giving a holder 
of any securities of the Company the right to require the Company to initiate 
registration of any securities of the Company. Any right given by the Company 
to any holder or prospective holder of the Company's securities in connection 
with the registration of securities shall be conditioned such that it shall 
be (i) consistent with the provisions of this Section 9 and with the rights 
of the Holders provided in this Agreement, and (ii) require the inclusion of 
Registrable Securities (within the meaning of this Agreement) in any 
registration required by any such holder or prospective holder on the same 
basis as securities of Other Shareholders are required to be included in 
registrations effected pursuant to Sections 9.5 and 9.6 of this Agreement.

         9.13 RULE 144 REPORTING. With a view to making available the benefits
of certain rules and regulations of the Commission which may permit the sale of
the Restricted Securities to the public without registration, the Company 
agrees to:

                  (a) Make and keep public information available, as those terms
are understood and defined in Rule 144 under the Securities Act;


                                  38
<PAGE>


                  (b) Use commercially reasonable efforts to file with the
Commission in a timely manner all reports and other documents required of the
Company under the Securities Act and the Exchange Act at any time after it has
become subject to such reporting requirements; and

                  (c) So long as a Purchaser owns any Restricted Securities,
furnish to the Purchasers forthwith upon request a written statement by the
Company as to its compliance with the reporting requirements of Rule 144 (at any
time from and after ninety (90) days following the effective date of the first
registration statement in connection with an offering of its Securities to the
general public), and of the Securities Act and the Exchange Act, a copy of the
most recent annual or quarterly report of the Company, and such other reports
and documents so filed as a Purchaser may reasonably request in availing itself
of any rule or regulation of the Commission allowing a Purchaser to sell any
such securities without registration.

         9.14 TRANSFER OF REGISTRATION RIGHTS. The rights to cause the Company
to register securities granted by the Company under this Section 9 may be
assigned by any Holder to a transferee or assignee, provided that the Company is
given written notice at the time of or within a reasonable time after said
transfer, stating the name and address of said transferee or assignee and
identifying the securities with respect to which such registration rights are
being assigned, and provided further that the transferee or assignee of such
rights is not deemed by the Board, in its reasonable judgment, to be a
competitor of the Company; and provided further that the transferee or assignee
of such rights assumes the obligations of such Purchaser under this Section 9.

                                SECTION 10

                                DEFINITIONS

         As used in this Agreement or in the Financing Documents, capitalized
terms shall have the respective meanings set forth in this Agreement (including,
without limitation, in Section 9.2 hereof) or set forth below or in the Section
of this Agreement referred to below:

         ADDITIONAL SHARES     -   Section 2.2.

         ADDITIONAL WARRANTS   -   Section 2.2.

         ADDITIONAL PURCHASERS -   Section 2.2.

         AFFILIATE shall mean any natural person, corporation, business trust,
association, company, partnership, joint venture or other entity or government
agency or political subdivision which directly or indirectly controls, is
controlled by or is under common control with each entity or person.

         ANNUAL BUDGET- Section 7.2.

         BALANCE SHEET - Section 3.6.


                                      39

<PAGE>



         BOARD shall mean the entire Board of Directors of the Company.

         CERTIFICATE - Section 1.1.

         CLOSING - Section 2.1.

         CLOSING DATE - Section 2.1.

         CODE - Section 7.8.

         COMMON STOCK - Section 3.4.


         CONFIDENTIAL INFORMATION MEMORANDUM shall mean the Confidential
Financing Memorandum dated May 1998 and all attachments thereto, delivered to
the Purchasers prior to the date of this Agreement.

         CONVERSION SHARES shall mean at any time, shares of Common Stock, $.001
par value, (i) issued and then outstanding upon the conversion of the Series A
Preferred, (ii) issuable upon the conversion of the Series A Preferred, and
(iii) issued and then outstanding or issuable in respect of the Common Stock
referred to in clause (i) of this definition upon any stock split, stock
dividend, recapitalization or similar event.

         ENVIRONMENTAL CLAIM shall mean any and all administrative, regulatory
or judicial actions, suits, demands, demand letters, directives, claims, liens,
investigations, proceedings or notices of compliance or violation (written or
oral) by any person or entity (including any governmental authority) alleging
potential liability (including, without limitation, potential liability for
enforcement, investigatory costs, cleanup costs, governmental response costs,
removal costs, remedial costs, natural resources damages, property damages,
personal injuries, or penalties) arising out of, based on or resulting from (a)
the presence, or Release or threatened Release into the environment, of any
Hazardous Material at any location, whether owned, operated, leased or managed
by the Company or its Subsidiaries, or (b) circumstances forming the basis of
any violation, or alleged violation, of any Environmental Law, or (c) any and
all claims by any third party seeking damages, contribution, indemnification,
cost recovery, compensation or injunctive relief resulting from the presence or
Release of any Hazardous Materials.

         ENVIRONMENTAL LAWS shall mean all laws or orders relating to the
regulation or protection of human health, safety or the environmental
(including, without limitation, ambient air, soil, surface water, ground water,
wetlands, land or subsurface strata), including, without limitation, laws and
regulations relating to Releases or threatened Releases of Hazardous Materials,
or otherwise relating to the manufacture, processing, distribution, use,
treatment, storage, disposal, transport, recycling or handling of Hazardous
Materials.

         ENVIRONMENTAL PERMITS - Section 3.18.


                                      40
<PAGE>



         EQUITY SECURITIES shall mean any stock or similar security, including
without limitation securities containing equity features and securities
containing profit participation features, or any security convertible or
exchangeable, with our without consideration, into any stock or similar
security, or any security carrying any warrant or right to subscribe to or
purchase any stock or similar security, or any such warrant or right.

         ERISA - Section 3.18.

         EXCHANGE ACT - Section 7.1.

         EXCHANGE NOTE - Section 7.17.

         FINANCING DOCUMENTS shall mean collectively, the Certificate, the
Warrants, the Shareholders' Agreement and all other documents set forth in any
other schedules or exhibits hereto (other than Exhibit D), under which, upon its
execution thereof, the Company, any Subsidiary, any Founder or any Related Party
shall have an obligation to any Purchaser, all in the respective forms thereof
as executed and as amended from time to time.

         FINANCIAL STATEMENTS - Section 3.6.

         HAZARDOUS MATERIALS shall mean (a) any petroleum or petroleum products,
radioactive materials, asbestos in any form that is or could become friable,
above ground or underground storage tanks and compressors or other equipment
that contain polychlorinated biphenyls ("PCBs"), and (b) any chemicals,
materials or substances which are now defined as or included in the definition
of "hazardous substances," "hazardous wastes," "hazardous materials," "extremely
hazardous wastes," "restricted hazardous wastes," "toxic substances," "toxic
pollutants," "pollutants," "contaminants" or words of similar import, under any
Environmental Law; and (c) any other chemical, material, substance or waste,
exposure to which is now prohibited, limited or regulated under any
environmental law.

         HOLDER - Section 9.2.

         INDEBTEDNESS shall mean any obligation of the Company or any
Subsidiary, contingent or otherwise, which under generally accepted accounting
principles is required to be shown on the balance sheet of the Company or such
Subsidiary as a liability. Any obligation secured by a Lien on, or payable out
of the proceeds of or production from, property of the Company or any Subsidiary
shall be deemed to be Indebtedness even though such obligation is not assumed by
the Company or Subsidiary.

         INITIAL PUBLIC OFFERING shall mean the first underwritten public
offering pursuant to an effective registration statement under the Securities
Act covering the offering and sale of Common Stock for the account of the
Company, on a firm commitment basis.


                                      41
<PAGE>



         INTELLECTUAL PROPERTY - Section 3.12.

         INVENTION AND SECRECY AGREEMENT - Section 3.16.

         LISTED RIGHTS - Section 3.12.

         PERMITTED LIENS shall mean (a) Liens for taxes and assessments or
governmental charges or levies not at the time due or in respect of which the
validity thereof shall currently be contested in good faith by appropriate
proceedings conducted with due diligence and for the payment of which the
Company has furnished adequate security, (b) Liens in respect of pledges or
deposits under workers' compensation laws or similar legislation, carriers',
warehousemen's, mechanics', laborers' and materialmen's and similar Liens, if
the obligations secured by such Liens are not then delinquent or are being
contested in good faith by appropriate proceedings conducted with due diligence
and for the payment of which the Company has furnished adequate security, (c)
statutory Liens incidental to the conduct of the business of the Company or any
Subsidiary which were not incurred in connection with the borrowing of money or
the obtaining of advances or credits and which do not in the aggregate
materially detract from the value of its property or materially impair the use
thereof in the operation of its business, and (d) purchase money liens or
security interests securing the cost of acquisition of assets subject to such
liens or security interests.

         PERSON shall include all natural persons, corporations, business
trusts, associations, companies, partnerships, joint ventures and other entities
and governments and agencies and political subdivisions.

         RELATED PARTY shall mean any officer, director, employee or consultant
of the Company or any Subsidiary or any holder of 5% or more of any class of
capital stock of the Company or any Subsidiary or any member of the immediate
family of any such officer, director, employee, consultant or shareholder or any
entity controlled by any such officer, director, employee, consultant or
shareholder or a member of the immediate family of any such officer, director,
employee, consultant or shareholder.

         RELEASE shall mean any release, spill, emission, leaking, injection,
deposit, disposal, discharge, dispersal, leaching or migration into the
atmosphere, soil, surface water, ground water or property.

         RESTRICTED SECURITIES - Section 9.2.

         SEC - Section 3.22.

         SEC DOCUMENTS - Section 3.22.

         SECURITIES ACT - Section 3.14.

         SERIES A PREFERRED - Section 1.1


                                      42
<PAGE>



         SHAREHOLDERS' AGREEMENT - Section 5.11.

         SHARES - Section 1.1.

         SUBSIDIARY shall mean any corporation, partnership, joint venture,
association or other business entity at least 50% of the outstanding voting
stock or voting interests of which is at the time owned or controlled, directly
or indirectly, by the Company or by one or more of such Subsidiary entities or
both.

         TECHNOLOGY - Section 3.12.

         WARRANT - Section 1.1.

         WARRANT SHARES shall mean at any time, shares of Common Stock, $.001 
par value, (i) issued and then outstanding upon the exercise of the Warrants, 
(ii) issuable upon the exercise of the Warrants, and (iii) issued and then 
outstanding or issuable in respect of the Common Stock referred to in clause 
(i) of this definition upon any stock split, stock dividend, recapitalization 
or similar event.

                                   SECTION 11

                                 MISCELLANEOUS

         11.1 GOVERNING LAW. This Agreement shall be governed by, and construed
and enforced in accordance with, the laws of the State of Delaware. The parties
agree that any legal or equitable suit, action or proceeding arising out of this
Agreement may be instituted and prosecuted in any state or federal court in the
State of Delaware and for the purposes of this Agreement, irrevocably submit to
the jurisdiction of any such court in any such suit, action or proceeding, and
hereby irrevocably name the Secretary of State of the State of Delaware an agent
for service of process.

         11.2 SURVIVAL. The representations, warranties, covenants and
agreements made herein shall survive any investigation made by any Purchaser and
shall survive the Closing for such time as any Shares, Conversion Shares,
Warrants and Warrant Shares have not been registered under the Securities Act or
otherwise sold to the public.

         11.3 SUCCESSORS AND ASSIGNS. Except as otherwise expressly provided
herein, the provisions hereof shall inure to the benefit of, and be binding
upon, the successors, assigns, heirs, executors and administrators of the
parties hereto; PROVIDED, HOWEVER, that the Company may not assign its rights
hereunder. Without limiting the generality of the foregoing, all
representations, covenants and agreements benefiting the Purchasers shall inure
to the benefit of any and all subsequent holders from time to time of the
Shares, the Conversion Shares, the Warrants and the Warrant Shares.


                                      43
<PAGE>



         11.4 ENTIRE AGREEMENT. This Agreement (including the Schedules and
Exhibits hereto) and the other documents delivered pursuant hereto constitute
the full and entire understanding and agreement between the parties with regard
to the subjects hereof and thereof. Except as otherwise expressly provided
herein, neither this Agreement nor any term hereof may be amended, waived,
discharged or terminated, except by a written instrument signed by the Company
and the holders of seventy-five percent (75%) or more of the Shares, Conversion
Shares, Warrants and Warrant Shares and Exchange Notes which have not been sold
to the public, but in no event shall this paragraph be amended or the obligation
of any Purchaser hereunder increased, except upon the written consent of such
Purchaser.

         11.5 NOTICES, ETC.

                  (a) All notices and other communications required or permitted
hereunder shall be in writing and shall be mailed by first-class, registered or
certified mail, postage prepaid, or delivered either by hand or by messenger, or
sent via telex, telecopier, computer mail or other electronic means, addressed
(a) if to a Purchaser, at the address shown on the Schedule of Purchasers, or at
such other address as such Purchaser shall have furnished to the Company in
writing, with a copy sent to: Frank J. Marco, Esq., Day, Berry & Howard LLP,
CityPlace I, Hartford, CT 06103, fax (860) 275-0343 (b) if to any other holder
of any Shares or any Conversion Shares, at such address as such holder shall
have furnished to the Company in writing, or, until any such holder so furnishes
an address to the Company, then to and at the address of the last holder thereof
who has so furnished an address to the Company, or (c) if to the Company, 24015
Garnier Street, Torrance, CA 90505, Attention: President and Chief Executive
Officer, or at such other address as the Company shall have furnished to the
Purchasers and each such other holder in writing, with a copy to: Nick E. Yocca,
Esq., Stradling, Yocca, Carlson & Rauth, 660 Newport Center Drive, Suite 1600,
Newport Beach, CA 92660.

                  (b) Any notice or other communications so addressed and
mailed, postage prepaid, by registered or certified mail (in each case, with
return receipt requested) shall be deemed to be given when so mailed. Any notice
so addressed and otherwise delivered shall be deemed to be given when actually
received by the addressee.

         11.6 DELAYS OR OMISSIONS. No delay or omission to exercise any 
right, power or remedy accruing to any holder of Shares or Conversion Shares, 
upon any breach or default of the Company under this Agreement, shall impair 
any such right, power or remedy of such holder nor shall it be construed to 
be a waiver of any such breach or default, or an acquiescence therein, or of 
or in any similar breach or default thereafter occurring; nor shall any 
waiver of any single breach or default be deemed a waiver of any other breach 
or default theretofore or thereafter occurring. Any waiver, permit, consent 
or approval of any kind or character on the part of any holder of any breach 
or default under this Agreement, or any waiver on the part of any holder of 
any provisions or conditions of this Agreement must be made in writing and 
shall be effective only to the extent specifically set forth in such writing. 
All remedies, either under this Agreement or by law or otherwise afforded to 
any holder, shall be cumulative and not alternative.


                                      44
<PAGE>



         11.7 RIGHTS; SEPARABILITY.  In case any provision of this Agreement 
shall be invalid, illegal or unenforceable, the validity, legality and 
enforceability of the remaining provisions shall not in any way be affected 
or impaired thereby.

         11.8 AGENT'S FEES AND SERVICES.

                  (a) The Company represents and warrants that, except as
disclosed in the Schedule of Exceptions, it has retained no finder or broker or
other person or firm in connection with the transactions contemplated by this
Agreement. The Company accepts sole responsibility for and agrees to pay all
agent's fees to any broker, finder or other person or firm in connection with
the transactions contemplated herein. In addition, the Company hereby agrees to
indemnify and to hold the Purchasers harmless of and from any liability for any
commission or compensation in the nature of an agent's fee to any broker, finder
or other person or firm (and the costs and expenses of defending against such
liability or asserted liability) arising from any act by the Company or any of
its employees or representatives.

                  (b) Each Purchaser represents and warrants as to itself 
only that it has retained no finder or broker in connection with the 
transactions contemplated by this Agreement.

         11.9 LEGAL FEES AND EXPENSES. The Company shall bear its own expenses
and legal fees incurred on its behalf with respect to this Agreement and the
transactions contemplated hereby. On the Closing Date (or if no closing shall
take place, within thirty (30) days of receiving any statement or invoice
therefor), the Company will pay the reasonable legal fees not to exceed $30,000
and out-of-pocket expenses of Day, Berry & Howard LLP, special counsel to the
Purchasers, with respect to this Agreement and the transactions contemplated
hereby.

         11.10 TITLES AND SUBTITLES. The titles of the Sections and subsection's
of this Agreement are for convenience or reference only and are not to be
considered in construing this Agreement.

         11.11 COUNTERPARTS. This Agreement may be executed in counterparts, 
each of which when so executed and delivered shall constitute a complete and 
original instrument but all of which together shall constitute one and the 
same agreement, and it shall not be necessary when making proof of this 
Agreement or any counterpart thereof to account for any other counterpart.


                                      45
<PAGE>



         IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed and delivered by their proper and duly authorized officers as of the
day and year first written above.

                                       HELISYS, INC.


                                       By:    /s/Gary S. Moskovitz
                                          ---------------------------------
                                       Name: Gary S. Moskovitz
                                       Title:   President and CEO


                                       PURCHASERS:


                                       TELANTIS VENTURE PARTNERS V, INC.


                                       By:   /s/Adam H. Meyerson
                                          ---------------------------------
                                       Name: Adam H. Meyerson
                                       Its:     President


                                       VISALIA TRUST


                                       By:   /s/Reed L. Harman
                                          ---------------------------------
                                       Name: Reed L. Harman
                                       Its:


                                      46
<PAGE>



                                                                      SCHEDULE 1

                             SCHEDULE OF PURCHASERS

<TABLE>
<CAPTION>
NAME AND ADDRESS                                         SHARES      WARRANTS
- ----------------                                         ------      --------
<S>                                      <C>            <C>         <C>
Telantis Venture Partners V, Inc.         $250,000       40,000      500,000
791 Wye Road
Akron, OH 44333
(330) 664-2914

Visalia Trust                             $150,000       24,000      300,000
1820 Via Visalia
Palos Verdes, CA 90274
(310) 373-7538

                                          --------     --------     --------
                                          $400,000       64,000      800,000
</TABLE>

                                      47


<PAGE>

THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, 
AS AMENDED, OR ANY STATE SECURITIES LAWS. THEY MAY NOT BESOLD OR OFFERED FOR 
SALE IN THE ABSENCE OF AN EFFECTIVEREGISTRATION STATEMENT AS TO THE 
SECURITIES UNDER SAID ACT AND ANYAPPLICABLE STATE SECURITIES LAWS OR THE 
AVAILABILITY OF ANEXEMPTION FROM REGISTRATION UNDER SAID ACT.



                                   HELISYS, INC.


No. 3

                      Warrant to Subscribe for 300,000 Shares
                                  of Common Stock

                            STOCK SUBSCRIPTION WARRANT

                                 September 14, 1998

                          NOT TRANSFERABLE OR EXERCISABLE
                      EXCEPT UPON CONDITIONS HEREIN SPECIFIED

     THIS CERTIFIES that, for value received, VISALIA TRUST (the "Holder") is 
entitled  to  subscribe  for  and  purchase  from HELISYS, INC., a Delaware 
corporation (hereinafter, the "Company"), Three Hundred Thousand (300,000) 
shares of Common Stock (as hereinafter defined), subject to adjustment from 
time to time as hereinafter provided, at the price of $0.35 per share (such 
price from time to time subject to adjustment in accordance with Section 2 
hereof and hereinafter called the "Warrant Price"), at any time or from time 
to time during the Term of this Warrant (as hereinafter defined). The 
exercise of this Warrant shall be subject to the provisions, limitations and 
restrictions herein contained and may be exercised in whole or in part.

SECTION 1. DEFINITIONS.

     For all purposes of this Warrant, the following terms shall have the 
meanings indicated:

     COMMON STOCK - shall mean and include the Company's authorized common 
stock, par value $.001 per share.

     SECURITIES ACT - the Securities Act of 1933, as amended.

     TERM OF THIS WARRANT - shall mean the period beginning on the date of 
initial issuance hereof and ending, subject to Section 2.4 hereof, at 
midnight on September 13, 2003.

<PAGE>

     WARRANT PRICE - shall have the meaning ascribed thereto in the first 
paragraph of this Warrant.

     WARRANTS - this Warrant and any other Warrant or Warrants issued 
pursuant to the provisions of this Warrant to the original holder of this 
Warrant, or any transferees from such original holder or this holder.

     WARRANT SHARES - shares of Common Stock purchased or purchasable by the 
Holder of this Warrant upon the exercise hereof.

SECTION 2. EXERCISE OF WARRANT.

     2.1  PROCEDURE FOR EXERCISE OF WARRANT. To exercise this Warrant in 
whole or in part, the Holder shall deliver to the Company at its office 
referred to in Section 10 hereof at any time during the Term of this Warrant: 
(i) the Notice of Exercise in the form attached hereto, (ii) cash or check 
payable to the order of the Company, or evidences of indebtedness issued to 
the Holder by the Company, in the amount of the purchase price, and (iii) 
this Warrant.  Notwithstanding any provisions herein to the contrary, if the 
Current Market Price is greater than the Warrant Price (at the date of 
calculation, as set forth below), in lieu of exercising this Warrant as 
hereinabove permitted, the Holder may elect to receive shares of Common Stock 
equal to the value (as determined below) of this Warrant (or the portion 
thereof being canceled) by surrender of this Warrant at the office of the 
Company referred to in Section 10 hereof, together with the Notice of 
Exercise, in which event the Company shall issue to the Holder that number of 
shares of Common Stock computed using the following formula:


                             CS = WCS X (CMP-WP)
                             -------------------
                                     CMP


Where:

     CS equals the number of shares of Common Stock to be issued to the Holder;

     WCS equals the number of shares of Common Stock purchasable under the
     Warrant or, if only a portion of the Warrant is being exercised, the
     portion of the Warrant being exercised (at the date of such calculation);

     CMP equals the Current Market Price (at the date of such calculation); and

     WP equals the Warrant Price (as adjusted to the date of such calculation).


In the event of any exercise of the rights represented by this Warrant, the
Holder shall be deemed to be the holder of record of the Common Stock issuable
upon such exercise, notwithstanding that the


                                      -2-
<PAGE>

stock transfer books of the Company may then be closed or that certificates 
representing such Common Stock may not then be actually delivered to such 
Holder.  The Company shall, as promptly as practicable thereafter, and in any 
event within ten  (10) business days, execute, or cause to be executed, and 
deliver to the Holder, or Holder's nominee, a certificate or certificates 
representing the aggregate number of shares of Common Stock issuable upon the 
exercise hereof.  Each stock certificate so delivered shall be in such 
denomination as may be requested by the Holder and shall be registered in the 
name of the Holder or such other name as shall be designated by the Holder.  
If this Warrant shall have been exercised only in part, the Company shall, at 
the time of delivery of said stock certificate or certificates, deliver to 
such Holder a new Warrant evidencing the right of such Holder to purchase the 
remaining shares of Common Stock covered by this Warrant. The Company shall 
pay all expenses, taxes and other charges payable in connection with the 
preparation, execution and delivery of stock certificates pursuant to this 
Section, regardless of the name or names in which such stock certificates 
shall be registered.

     2.2  TRANSFER RESTRICTION LEGEND.  Each certificate for Warrant Shares 
initially issued upon exercise of this Warrant shall bear the following 
legend (and any additional legend required by any securities exchange upon 
which such Warrant Shares may, at the time of such exercise, be listed) on 
the face thereof unless such Warrant Shares shall be registered under the 
Securities Act at the time of exercise:

     "The securities represented by this certificate have not been registered
     under the Securities Act of 1933, as amended, or any state securities laws.
     They may not be sold or offered for sale in the absence of an effective
     registration statement as to the securities under said Act and any
     applicable state securities law or the availability of an exemption from
     registration under said Act."

Any certificate issued at any time in exchange or substitution for any 
certificate bearing such legend (except a new certificate issued upon 
completion of a public distribution under a registration statement of the 
securities represented thereby) shall also bear such legend unless, in the 
opinion of counsel for the holder thereof (which counsel shall be reasonably 
satisfactory to counsel for the Company), the securities represented thereby 
are not, at such time, required by law to bear such legend.

     2.3  CHARACTER OF  WARRANT SHARES.  All shares of Common Stock issuable 
upon the exercise of this Warrant shall, when so issued, be duly authorized, 
validly issued, and, upon payment of the exercise price, fully paid and 
nonassessable.


                                      -3-
<PAGE>

     2.4  ADJUSTMENT OF NUMBER OF SHARES.  Upon each adjustment of the 
Warrant Price as provided in Section 2.5, the holder of this Warrant shall 
thereafter be entitled to purchase, at the Warrant Price resulting from such 
adjustment, the number of shares (calculated to the nearest tenth of a share) 
obtained by multiplying the Warrant Price in effect immediately prior to such 
adjustment by the number of shares purchasable pursuant hereto immediately 
prior to such adjustment and dividing the product thereof by the Warrant 
Price resulting from such adjustment.

     2.5  ADJUSTMENT OF WARRANT PRICE.  The Warrant Price shall be subject to 
adjustment from time to time as follows:

     (i)  If the Company shall at any time or from time to time during the 
Term of this Warrant issue shares of Common Stock other than Excluded Stock 
(as hereinafter defined) without consideration or for a consideration per 
share less than the Warrant Price in effect immediately prior to the issuance 
of such Common Stock, the Warrant Price in effect immediately prior to each 
such issuance or adjustment shall forthwith (except as provided in this 
clause (i)) be adjusted to a price equal to the quotient obtained by dividing:

     (A) an amount equal to the sum of

          (x) the total number of shares of Common Stock outstanding (including
     any shares of Common Stock deemed to have been issued pursuant to
     subdivision (3) of this clause (i) and to clause (ii) below) immediately
     prior to such issuance multiplied by the Warrant Price in effect
     immediately prior to such issuance, plus

          (y) the consideration received by the Company upon such issuance,

     by

     (B)  the total number of shares of Common Stock outstanding (including any
          shares of Common Stock deemed to have been issued pursuant to
          subdivision (3) of this clause (i) and to clause (ii) below)
          immediately after the issuance of such Common Stock.

For the purposes of any adjustments of the Warrant Price pursuant to this clause
(i), the following provisions shall be applicable:

          (1)  In the case of the issuance of Common Stock for cash, the
     consideration shall be deemed to be the amount of cash paid therefor after
     deducting therefrom any discounts, commissions or other expenses allowed,
     paid or incurred by the Company for any underwriting or otherwise in
     connection with the issuance and sale thereof.

          (2)  In the case of the issuance of Common Stock for consideration in
     whole or in part other than cash, the consideration other than cash shall
     be deemed to be the fair market value thereof as determined in good faith
     by the Board of Directors; provided, however, that


                                      -4-
<PAGE>

     such fair market value as determined by the Board of Directors shall not
     exceed the aggregate Current Market Price (as hereinafter defined) of the
     shares of Common Stock being issued.

          (3)  In the case of the issuance of (i) options to purchase or rights
     to subscribe for Common Stock, (ii) securities by their terms convertible
     into or exchangeable for Common Stock or (iii) options to purchase or
     rights to subscribe for such convertible or exchangeable securities:

     (A)  the aggregate maximum number of shares of Common Stock deliverable
          upon exercise of such options to purchase or rights to subscribe for
          Common Stock shall be deemed to have been issued at the time such
          options or rights were issued and for consideration equal to the
          consideration (determined in the manner provided in subdivisions (1)
          and (2) above with the proviso in subdivision (2) being applied to the
          number of shares of Common Stock deliverable upon such exercise), if
          any, received by the Company upon the issuance of such options or
          rights plus the minimum purchase price provided in such options or
          rights for the Common Stock covered thereby;

     (B)  the aggregate maximum number of shares of Common Stock deliverable
          upon conversion of or in exchange for any such convertible or
          exchangeable securities or upon the exercise of options to purchase or
          rights to subscribe for such convertible or exchangeable securities
          and subsequent conversions or exchanges thereof shall be deemed to
          have been issued at the time such securities were issued or such
          options or rights were issued and for a consideration equal to the
          consideration received by the Company for any such securities and
          related options or rights (excluding any cash received on account of
          accrued interest or accrued dividends), plus the additional
          consideration, if any, to be received by the Company upon the
          conversion or exchange of such securities or the exercise of any
          related options or rights (the consideration in each case to be
          determined in the manner provided in subdivisions (1) and (2) above
          with the proviso in subdivision (2) being applied to the number of
          shares of Common Stock deliverable upon such conversion, exchange or
          exercise);

     (C)  on any change in the number of shares of Common Stock deliverable upon
          exercise of any such options or rights or conversion of or exchange
          for such convertible or exchangeable securities, other than a change
          resulting from the antidilution provisions thereof, the Warrant Price
          shall forthwith be readjusted to such Warrant Price as would have
          obtained had the adjustment made upon the issuance of such options,
          rights or securities not converted prior to such change or options or
          rights related to such securities not converted prior to such change
          been made upon the basis of such change; and


                                      -5-
<PAGE>

     (D)  on the expiration of any such options or rights, the termination of
          any such rights to convert or exchange or the expiration of any
          options or rights related to such convertible or exchangeable
          securities, the Warrant Price shall forthwith be readjusted to such
          Warrant Price as would have obtained had the adjustment made upon the
          issuance of such options, rights, securities or options or rights
          related to such securities been made upon the basis of the issuance of
          only the number of shares of Common Stock actually issued upon the
          conversion or exchange of such securities or upon the exercise of the
          options or rights related to such securities.

     (ii)  "Excluded Stock" shall mean shares of Common Stock issued by the 
Company (1) as a stock dividend payable in shares of Common Stock or upon any 
subdivision or split-up of the outstanding shares of Common Stock; (2) upon 
conversion of shares of Series A Preferred Stock; (3) to employees, officers 
or directors of, or consultants to, the Corporation pursuant to the Company's 
Employee Stock Purchase Plan or the Company's Stock Incentive Plan, in each 
case as existing on the date hereof; or (4) to financial institutions in 
connection with borrowing or lease financing arrangements of the Company, 
provided that at least eighty percent (80%) of the entire Board of Directors 
approves thereof.

     (iii) If, at any time during the Term of this Warrant, the number of 
shares of Common Stock outstanding is increased by a stock dividend payable 
in shares of Common Stock or by a subdivision or split-up of shares of Common 
Stock, then, following the record date fixed for the determination of holders 
of Common Stock entitled to receive such stock dividend, subdivision or 
split-up, the Warrant Price shall be appropriately decreased so that the 
number of shares of Common Stock issuable upon the exercise hereof shall be 
increased in proportion to such increase in outstanding shares.

     (iv)  If, at any time during the Term of this Warrant, the number of 
shares of Common Stock outstanding is decreased by a combination of the 
outstanding shares of Common Stock, then, following the record date for such 
combination, the Warrant Price shall appropriately increase so that the 
number of shares of Common Stock issuable upon the exercise hereof shall be 
decreased in proportion to such decrease in outstanding shares.

     (v)   In case, at any time during the Term of this Warrant, the Company 
shall declare a cash dividend upon its Common Stock payable otherwise than 
out of earnings or earned surplus or shall distribute to holders of its 
Common Stock shares of its capital stock (other than Common Stock), stock or 
other securities of other persons, evidences of indebtedness issued by the 
Company or other persons, assets (excluding cash dividends and distributions) 
or options or rights (excluding options to purchase and rights to subscribe 
for Common Stock or other securities of the Company convertible into 
exchangeable for Common Stock), then, in each such case, immediately 
following the record date fixed for the determination of the holders of 
Common Stock entitled to receive such dividend or distribution, the Warrant 
Price in effect thereafter shall be determined by multiplying the Warrant 
Price in effect immediately prior to such record date by a fraction of which 
the numerator shall be an amount equal to the remainder of (x) the Current 
Market Price of one share of Common Stock less


                                      -6-
<PAGE>

(y) the fair market value (as determined by the Board of Directors, whose 
determination shall be conclusive) of the stock, securities, evidences of 
indebtedness, assets, options or rights so distributed in respect to one 
share of Common Stock, and of which the denominator shall be such Current 
Market Price.

     (vi)   All calculations under this Section 2.5 shall be made to the 
nearest cent or to the nearest one-tenth (1/10) of a share, as the case may 
be.

     (vii)  For the purpose of any computation pursuant to this Section 2.5, 
the Current Market Price at any date of one share of Common Stock shall be 
deemed to be the average of the daily closing prices for the 30 consecutive 
business days ending no more than 15 business days before the day in question 
(as adjusted for any stock dividend, split, combination or reclassification 
that took effect during such 30 business day period).  The closing price for 
each day shall be the last reported sales price regular way or, in case no 
such reported sales took place on such day, the average of the last reported 
bid and asked prices regular way, in either case on the principal national 
securities exchange on which the Common Stock is listed or admitted to 
trading (or if the Common Stock is not at the time listed or admitted for 
trading on any such exchange, then such price as shall be equal to the 
average of the last reported bid  and asked prices, as reported by the 
National Association of Securities Dealers Automated Quotations System 
("NASDAQ") on such day, or if, on any day in question, the security shall not 
be quoted on the NASDAQ, then such price shall be equal to the average of the 
last reported bid and asked prices on such day as reported by The National 
Quotation Bureau Incorporated or any similar reputable quotation and 
reporting service, if such quotation is not reported by The National 
Quotation Bureau Incorporated); provided, however, that if the  Common Stock 
is not traded in such manner that the quotations referred to in this Section 
5(d) are available for the period required hereunder, the Current Market 
Price shall be mutually determined in good faith by agreement of the Board of 
Directors of the Company and the majority in interest of the Holders of the 
Warrants or, if such determination cannot be made, by a nationally recognized 
independent investment banking firm agreed upon by the Board of Directors of 
the Company and a majority in interest of the Holders of the Warrants (or if 
such selection cannot be made, by a nationally recognized independent 
investment banking firm selected by the American Arbitration Association in 
accordance with its rules).

     (viii) Whenever the Warrant Price shall be adjusted as provided in 
Section 2.5, the Company shall prepare a statement showing the facts 
requiring such adjustment and the Warrant Price that shall be in effect after 
such adjustment.  The Company shall cause a copy of such statement to be sent 
by mail, first class postage prepaid, to each Holder of this Warrant at his 
address appearing on the Company's records.  Where appropriate, such copy may 
be given in advance and may be included as part of the notice required to be 
mailed under the provisions of subsection (x) of this Section 2.5.

     (ix)   Adjustments made pursuant to clauses (iii), (iv) and (v) above 
shall be made on the date such dividend, subdivision, split-up, combination 
or distribution, as the case may be, is made, and shall become effective at 
the opening of business on the business day next following the record 


                                      -7-
<PAGE>

date for the determination of stockholders entitled to such dividend, 
subdivision, split-up, combination or distribution.

     (x)  In the event the Company shall propose to take any action of the types
described in clauses (iii), (iv), or (v) of this Section 2.5, the Company shall
forward, at the same time and in the same manner, to the Holder of this Warrant
such notice, if any, which the Company shall give to the holders of capital
stock of the Company.  Failure to give such notice, or any defect therein, shall
not affect the legality or validity of any such action.

     (xi) In any case in which the provisions of this Section 2.5 shall require
that an adjustment shall become effective immediately after a record date for an
event, the Company may defer until the occurrence of such event issuing to the
Holder of all or any part of this Warrant which is exercised after such record
date and before the occurrence of such event the additional shares of capital
stock issuable upon such exercise by reason of the adjustment required by such
event over and above the shares of capital stock issuable upon such exercise
before giving effect to such adjustment exercise; provided, however, that the
Company shall deliver to such Holder a due bill or other appropriate instrument
evidencing such Holder's right to receive such additional shares upon the
occurrence of the event requiring such adjustment.

     (xii)     The sale or other disposition of any Common Stock theretofore
held in the treasury of the Company shall be deemed to be an issuance thereof.

     (xiii)    The Company shall reserve, free from preemptive rights, out of
its treasury stock or its authorized but unissued shares of Common Stock, or
both, solely for the purpose of effecting the exercise of this Warrant,
sufficient shares to provide for the exercise of this Warrant.

SECTION 3. OWNERSHIP.

     3.1  OWNERSHIP OF THIS WARRANT. The Company may deem and treat the person
in whose name this Warrant is registered as the Holder and owner hereof
(notwithstanding any notations of ownership or writing hereon made by anyone
other than the Company) for all purposes and shall not be affected by any notice
to the contrary until presentation of this Warrant for registration of transfer
as provided in this Section 3.

     3.2  TRANSFER AND REPLACEMENT.  This Warrant and all rights hereunder 
are transferable in whole or in part upon the books of the Company by the 
Holder hereof in person or by duly authorized attorney, and a new Warrant or 
Warrants, of the same tenor as this Warrant but registered in the name of the 
transferee or transferees shall be made and delivered by the Company upon 
surrender of this Warrant duly endorsed, at the office of the Company 
referred to in Section 10 hereof; provided, however, that except for 
transfers in whole or in part to partners and other affiliates of the Holder, 
this Warrant shall not be transferred except if sold in its entirety. Upon 
receipt by the Company of evidence reasonably satisfactory to it of the loss, 
theft or destruction, and, in such case,

                                       -8-
<PAGE>

of indemnity or security reasonably satisfactory to it, and upon surrender of 
this Warrant if mutilated, the Company will make and deliver a new Warrant of 
like tenor, in lieu of this Warrant; provided that if the Holder hereof is an 
instrumentality of a state or local government or an institutional holder or 
a nominee for such an instrumentality or institutional holder an agreement of 
indemnity by such Holder shall be sufficient for all purposes of this Section 
3, and no evidence of loss or theft or destruction shall be necessary.  This 
Warrant shall be promptly canceled by the Company upon the surrender hereof 
in connection with any transfer or replacement.  Except as otherwise provided 
above, in the case of the loss, theft or destruction of a Warrant, the 
Company shall pay all expenses, taxes and other charges payable in connection 
with any transfer or replacement of this Warrant, other than stock transfer 
taxes (if any) payable in connection with a transfer of this Warrant, which 
shall be payable by the Holder.

SECTION 4. MERGERS, CONSOLIDATION, SALES.

     In the case of any proposed consolidation or merger of the Company with
another corporation, or the proposed sale of all or substantially all of its
assets to another corporation, or any proposed reorganization or
reclassification of the capital stock of the Company, then, as a condition of
such consolidation, merger, sale, reorganization or reclassification, lawful and
adequate provision shall be made whereby the Holder of this Warrant shall
thereafter have the right to receive upon the basis and upon the terms and
conditions specified herein, in lieu of the shares of the Common Stock of the
Company immediately theretofore purchasable hereunder, such shares of stock,
securities or assets as may (by virtue of such consolidation, merger, sale,
reorganization or reclassification) be issued or payable with respect to or in
exchange for the number of shares of such Common Stock purchasable hereunder
immediately before such consolidation, merger, sale, reorganization or
reclassification.  In any such case appropriate provision shall be made with
respect to the rights and interests of the Holder of this Warrant to the end
that the provisions hereof shall thereafter be applicable as nearly as may be,
in relation to any shares of stock, securities or assets thereafter deliverable
upon the exercise of this Warrant.  The Company shall not effect any such
consolidation, merger or sale unless prior to or simultaneously with the
consummation thereof the successor corporation or purchaser, as the case may be,
shall assume by written instrument the obligation to deliver to the Holder such
shares of stock, securities or assets as, in accordance with the foregoing
provisions, the Holder is entitled to receive.

SECTION 5.  NOTICE OF DISSOLUTION OR LIQUIDATION.

     In case of any distribution of the assets of the Company in dissolution 
or liquidation (except under circumstances when the foregoing Section 4 shall 
be applicable), the Company shall give notice thereof to the Holder hereof 
and shall make no distribution to shareholders until the expiration of thirty 
(30) days from the date of mailing of the aforesaid notice and, in any case, 
the Holder hereof may exercise this Warrant within thirty (30) days from the 
date of the giving of such notice, and all rights herein granted not so 
exercised within such thirty-day period shall thereafter become null and void.

                                       -9-
<PAGE>

SECTION 6.  NOTICE OF EXTRAORDINARY DIVIDENDS.

     If the Board of Directors of the Company shall declare any dividend or
other distribution on its Common Stock except out of earned surplus or by way of
a stock dividend payable in shares of its Common Stock, the Company shall mail
notice thereof to the Holder hereof not less than thirty (30) days prior to the
record date fixed for determining shareholders entitled to participate in such
dividend or other distribution, and the Holder hereof shall not participate in
such dividend or other distribution unless this Warrant is exercised prior to
such record date.  The provisions of this Section shall not apply to
distributions made in connection with transactions covered by Section 4.

SECTION 7.  FRACTIONAL SHARES.

     Fractional shares shall not be issued upon the exercise of this Warrant but
in any case where the Holder would, except for the provisions of this Section,
be entitled under the terms hereof to receive a fractional share upon  the
complete exercise of this Warrant, the Company shall, upon the exercise of this
Warrant for the largest number of whole shares then called for, pay a sum in
cash equal to the excess of the value of such fractional share (determined in
such reasonable manner as may be prescribed in good faith by the Board of
Directors of the Company).

SECTION 8.  TAXES.

     The Company covenants and agrees that it will pay when due and payable any
and all federal and state taxes which may be payable in respect of the issue of
this Warrant, or any Common Stock or certificates therefor issuable upon the
exercise of this Warrant.

SECTION 9.  CLOSING OF TRANSFER BOOKS.

     The right to exercise this Warrant shall not be suspended during any period
while the stock transfer books of the Company for its Common Stock may be
closed.  The Company shall not be required, however, to deliver certificates of
the Common Stock issuable upon the exercise of this Warrant while such books are
duly closed for any purpose, but the Company may postpone the delivery of the
certificates for such Common Stock until the opening of such books, and they
shall  be delivered forthwith upon the opening thereof, or as soon as
practicable thereafter, but in any case within ten (10) business days of the
exercise of this Warrant.

SECTION 10.  NOTICES.

     Any notice or other document required or permitted to be given or delivered
to the Holder shall be delivered at, or sent by certified or registered mail to
the Holder at the address set forth on the Company's records or to such other
address as shall have been furnished to the Company in writing by the Holder.
Any notice or other document required or permitted to be given or delivered to
the Company shall be delivered at, or sent by certified or registered mail to,
Helisys, Inc.,

                                       -10-
<PAGE>

Attention: President, 24015 Garnier Street, Torrance, CA 90505, or to such 
other address as shall have been furnished in writing to the Holder by the 
Company.  Any notice so addressed and mailed by registered or certified mail 
shall be deemed to be given when so mailed.  Any notice so addressed and 
otherwise delivered shall be deemed to be given when actually received by the 
addressee.

SECTION 11.  NO RIGHTS AS STOCKHOLDER; LIMITATION OF LIABILITY.

     This Warrant shall not entitle the Holder to any of the rights of a
shareholder of the Company.  No provision hereof, in the absence of affirmative
action by the Holder to purchase shares of Common Stock, and no mere enumeration
herein of the rights or privileges of the Holder, shall give rise to any
liability of the Holder for the Warrant Price hereunder or as a shareholder of
the Company, whether such liability is asserted by the Company or by creditors
of the Company.

SECTION 12.  GOVERNING LAW.

     This Warrant shall be governed by, and construed and enforced in accordance
with, the laws of the State of Delaware, without regard to the choice of law
provisions thereof.

SECTION 13.  AMENDMENT.

     The Holder hereof has agreed, by his acceptance hereof, that this Warrant
and any provision hereof may be changed, waived, discharged or terminated (i) by
an instrument in writing signed by the party (or any predecessor in interest
thereof) against which enforcement of the same is sought or (ii) if the Company
obtains the written consent to such change, waiver, discharge or termination
from the holder or holders of at least seventy-five percent (75%) of the Common
Stock issuable pursuant to this Warrant and the other Warrants issued on the
date hereof.

SECTION 14.  HEADINGS.

     The headings in this Warrant are for purposes of reference only and shall
not affect the meaning or construction of any of the provisions hereof.

                                       -11-
<PAGE>

     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its
duly authorized officer this 14th day of September, 1998.


                         HELISYS, INC.



                         By:   /s/ Gary S. Moskovitz
                             ---------------------------------------
                         Name:  Gary S. Moskovitz
                         Its:   President and CEO

                                       -12-
<PAGE>

                                      ASSIGNMENT

                       TO BE EXECUTED BY THE REGISTERED HOLDER
                            TO TRANSFER THE WITHIN WARRANT

     FOR VALUE RECEIVED ____________________________ hereby sells, assigns and
transfers unto ___________________________________________ all rights of the
undersigned under and pursuant to the within Warrant to purchase _________
shares of the Common Stock of Helisys, Inc., and the undersigned does hereby
irrevocably constitute and appoint ______________________________ Attorney 
to transfer the said Warrant on the books of the Company, with full power of
substitution.



                              ----------------------------------
                              [Type Name of Holder]


                              By:
                                 -------------------------------


Dated:                 , 19
       ----------------    ----

                                        NOTICE

     The signature to the foregoing Assignment must correspond to the name as
written upon the face of the within Warrant in every particular, without
alteration or enlargement or any change whatsoever.

                                       -13-
<PAGE>

                                  NOTICE OF EXERCISE


                       TO BE EXECUTED BY THE REGISTERED HOLDER
                            TO EXERCISE THE WITHIN WARRANT


     The undersigned hereby exercises the right to purchase _____ shares of 
the Common Stock of Helisys, Inc., which the undersigned is entitled to 
purchase by the terms of the within Warrant according to the conditions 
thereof, and herewith makes payment of the Warrant Price of such shares in 
full.  All shares to be issued pursuant hereto shall be issued in the name of 
__________________ __________________and the initial address of such person 
to be entered on the books of the Company shall be: _________________________.
The shares are to be issued in certificates of the following denominations:


                              ----------------------------------
                              [Type Name of Holder]


                              By:
                                 -------------------------------


Dated:                 , 19
       ----------------    ----



<PAGE>

                   RESTATED CERTIFICATE OF DESIGNATION OF RIGHTS,
                              PREFERENCES & PRIVILEGES
                                        OF
                             SERIES A PREFERRED STOCK
                                        OF
                                   HELISYS, INC.,
                               a Delaware corporation
 Pursuant to Section 151 of the General Corporation Law of the State of Delaware
                                 _________________


     HELISYS, INC., a corporation organized and existing under the General 
Corporation Law of the State of Delaware (the "Corporation"), hereby 
certifies, pursuant to the authority contained in the Certificate of 
Incorporation and in accordance with the provisions of Section 151 of the 
General Corporation Law of the State of Delaware that the following 
resolution has been duly adopted by the Board of Directors of the Corporation 
amending a series of its Preferred Stock designated as Series A Preferred 
Stock and deleting a series of its Preferred Stock designated as Series A 
Preferred Stock:

     RESOLVED, that pursuant to the authority expressly granted to and vested 
in the Board of Directors of the Corporation (the "Board") by the provisions 
of the Certificate of Incorporation of the Corporation (the "Certificate of 
Incorporation"), there hereby is created, out of the 5,000,000 shares of 
Preferred Stock, par value $0.001 per share, of the Corporation authorized in 
Article 4 of the Certificate of Incorporation (the "Preferred Stock"), a 
series of the Preferred Stock of the Corporation consisting of 144,000 
shares, which shall be designated Series A Convertible Preferred Stock (the 
"Series A Stock" or the "Preferred Stock").  The series of the Preferred 
Stock of the Corporation designated as Series A Convertible Preferred Stock 
(the "Series A Stock") but never issued is hereby deleted.  The Preferred 
Stock shall have the following powers, designations, preferences and 
relative, participating, optional and other rights, and the following 
qualifications, limitations and restrictions:

          RIGHTS, PREFERENCES AND PRIVILEGES OF PREFERRED STOCK.

     The following is a statement of the designations, powers, privileges, 
preferences and relative, participating, optional or other special rights, 
and the qualifications, limitations or restrictions relating to the Preferred 
Stock:


                                       1
<PAGE>

                                  SECTION 1

                                 DESIGNATION

     The initial series of Preferred Stock shall be designated and known as 
"Series A Preferred Stock."  The number of authorized shares constituting 
such series shall be 144,000.


                                  SECTION 2

                             LIQUIDATION RIGHTS

     (a)  LIQUIDATION.  In the event of any liquidation, dissolution or 
winding up of the Corporation, each holder of shares of Series A Preferred 
Stock shall be entitled to receive, prior and in preference to any 
distribution of any of the assets or surplus funds of the Corporation to the 
holders of the Common Stock and any other series of preferred stock which is 
junior to the Series A Preferred Stock, by reason of his, her or its 
ownership thereof, an amount per share of the Series A Preferred Stock equal 
to $6.25 (plus any dividends which, pursuant to Section 6 hereof, have 
accrued but remain unpaid at such time). After the payment to such holders of 
such preferential amount, any remaining assets shall be distributed to the 
holders of Common Stock on the basis of the number of shares of Common Stock 
held by each of them.

     (b)  PRO RATA DISTRIBUTION.  If the assets or surplus funds to be 
distributed to the holders of (i) the Series A Preferred Stock under Section 
2(a) and (ii) the holders of any other series of Preferred Stock ranking on a 
parity with the Series A Preferred Stock are insufficient to permit the 
payment to such holders of their full preferential amount, the assets and 
surplus funds legally available for distribution shall be distributed ratably 
among (i) the holders of the Series A Preferred Stock (to the extent provided 
in Section 2(a) hereof) and (ii) the holders of such other series of 
Preferred Stock in proportion to the full preferential amount each such 
holder is otherwise entitled to receive.

     (c)  SERIES A PREFERRED STOCK PRIORITY.  All of the preferential amounts 
to be paid to the holders of (i) the Series A Preferred Stock under this 
Section 2 and (ii) the holders of any other series of Preferred Stock ranking 
on a parity with the Series A Preferred Stock shall be paid or set apart for 
payment before the payment or setting apart for payment of any amount for, or 
the distribution of any assets of the Corporation to, the holders of the 
Common Stock and any other series of Preferred Stock which is junior to the 
Series A Preferred Stock in connection with such liquidation, dissolution or 
winding up.

     (d)  CONSOLIDATION, MERGER, SALE OF ASSETS.  A consolidation or merger 
of the Corporation with or into another corporation, or a conveyance of all 
or substantially all of the assets of the Corporation, shall be regarded as a 
liquidation, dissolution or winding up of the affairs of the Corporation 
within the meaning of Section 2(a) unless, upon consummation of such 
consolidation


                                       2
<PAGE>

or merger or sale of assets, the holders of voting securities of the 
Corporation own directly or indirectly more than fifty percent (50%) of the 
voting power to elect directors of the consolidated or surviving or acquiring 
corporation, PROVIDED, HOWEVER, that each holder of Series A Preferred Stock 
shall have the right to elect the benefits of the provisions of Section 
3(d)(vii) hereof in lieu of receiving payment in such liquidation, 
dissolution or winding up of the Corporation pursuant to this Section 2.


                                   SECTION 3

                                   CONVERSION

     The holders of the Series A Preferred Stock shall have conversion rights 
as follows (the "Conversion Rights"):

     (a)  RIGHT TO CONVERT.  Each share of Series A Preferred Stock shall be 
convertible, without the payment of any additional consideration by the 
holder thereof, at the option of the holder thereof, at the office of the 
Corporation or any transfer agent for the Series A Preferred Stock, into such 
number of fully paid and nonassessable shares of Common Stock as is 
determined by dividing $6.25 by the Conversion Price, determined as 
hereinafter provided, in effect at the time of conversion.  If more than one 
share of the Series A Preferred Stock shall be surrendered for conversion at 
the same time by the same holder of record, the number of full shares that 
shall be issuable upon the conversion thereof shall be computed on the basis 
of the total number of shares of the Series A Preferred Stock so surrendered. 
 Each share of Series A Preferred Stock shall be so convertible at any time 
after the date of issuance of such share. The price at which shares of Common 
Stock shall be deliverable upon conversion of Series A Preferred Stock 
without the payment of any additional consideration by the holder thereof 
(the "Conversion Price") shall initially be $0.25 per share of Common Stock.  
Such initial Conversion Price shall be subject to adjustment, in order to 
adjust the number of shares of Common Stock into which the Series A Preferred 
Stock is convertible, as hereinafter provided.

     (b)  RESERVED.

     (c)  MECHANICS OF CONVERSION.  Each party who holds of record Series A 
Preferred Stock at the time of any conversion shall be entitled to any 
dividends which, pursuant to Section 6 hereof, have accrued but remain unpaid 
at such time.  Such dividends shall be paid to all such holders within thirty 
(30) days of the conversion.  No fractional shares of Common Stock shall be 
issued upon conversion of the Series A Preferred Stock.  In lieu of any 
fractional share to which the holder would otherwise be entitled, the 
Corporation shall pay cash equal to such fraction multiplied by the then 
effective Conversion Price. Before any holder of Series A Preferred Stock 
shall be entitled to convert the same into full shares of Common Stock, he, 
she or it shall surrender the certificate or certificates therefor, duly 
endorsed, at the office of the Corporation or of any transfer agent for the 
Series A


                                       3
<PAGE>

Preferred Stock, and shall give written notice to the Corporation at such 
office that he, she or it elects to convert the same.  A holder surrendering 
his, her or its certificate or certificates shall notify the Corporation of 
his, her or its name or the name or names of his, her or its nominees in 
which he, she or it wishes the certificate or certificates for shares of 
Common Stock to be issued.  If the person or persons in whose name any 
certificate for shares of Common Stock issuable upon such conversion shall be 
other than the registered holder or holders of the Series A Preferred Stock 
being converted, the Corporation's obligation under this Section 3(c) shall 
be subject to the payment and satisfaction by such registered holder or 
holders of any and all transfer taxes in connection with the conversion and 
issuance of such Common Stock.  The Corporation shall, as soon as practicable 
thereafter (and, in any event, within ten (10) days of such surrender), issue 
and deliver at such office to such holder of Series A Preferred Stock, or to 
his, her or its nominee or nominees, a certificate or certificates for the 
number of shares of Common Stock to which he, she or it shall be entitled as 
aforesaid, together with cash in lieu of any fraction of a share.  Such 
conversion shall be deemed to have been made immediately prior to the close 
of business on the date of such surrender of the shares of Series A Preferred 
Stock to be converted, and the party or parties entitled to receive the 
shares of Common Stock issuable upon conversion shall be treated for all 
purposes as the record holder or holders of such shares of Common Stock on 
such date.

     (d)  ADJUSTMENTS TO CONVERSION PRICE FOR DILUTING ISSUES:

         (i)  SPECIAL DEFINITIONS.  For purposes of this Section 3(d), the
     following definitions shall apply:

                  (1)  "OPTION" shall mean options, warrants or other rights to
         subscribe for, purchase or otherwise acquire either Common Stock or
         Convertible Securities.

                  (2)  "ORIGINAL ISSUE DATE" shall mean the first date on which
         a share of Series A Preferred Stock shall have been issued.

                  (3)  "CONVERTIBLE SECURITIES" shall mean any evidences of
         indebtedness, shares (other than Common Stock and Series A Preferred
         Stock) of capital stock or other securities directly or indirectly
         convertible into or exchangeable for Common Stock.

                  (4)  "ADDITIONAL SHARES OF COMMON STOCK" shall mean any or all
         shares of Common Stock issued (or, pursuant to Section 3(d)(iii),
         deemed to be issued) by the Corporation after the Original Issue Date,
         other than shares of Common Stock issued or issuable:

         (A)           upon conversion of shares of Series A Preferred Stock; or


                                       4
<PAGE>

         (B)           to employees, officers or directors of, or consultants
                  to, the Corporation pursuant to the Company's Employee Stock
                  Purchase Plan or the Company's Stock Incentive Plan, in each
                  case as existing on the date of the adoption of this Restated
                  Certificate of Designation; or

         (C)           to financial institutions in connection with borrowing or
                  lease financing arrangements of the Company, provided that at
                  least eighty percent (80%) of the entire Board of Directors
                  approves thereof.

     (ii)  NO ADJUSTMENT OF CONVERSION PRICE.  Subject to the provisions of 
Section 3(d)(iii)(2) and Section 3(d)(vi) below, no adjustment in the number 
of shares of Common Stock into which any series of the Series A Preferred 
Stock is convertible shall be made, by adjustment in the Conversion Price of 
the Series A Preferred Stock in respect of the issuance of Additional Shares 
of Common Stock or otherwise, unless the consideration per share for an 
Additional Share of Common Stock issued or deemed to be issued by the 
Corporation is less than the Conversion Price in effect on the date of, and 
immediately prior to, the issue of such Additional Share of Common Stock.

     (iii) ISSUE OF SECURITIES DEEMED ISSUE OF ADDITIONAL SHARES OF COMMON
STOCK.

                  (1)  OPTIONS AND CONVERTIBLE SECURITIES.  In the event the
     Corporation at any time or from time to time after the Original Issue Date
     shall issue any Options or Convertible Securities or shall fix a record
     date for the determination of holders of any class of securities entitled
     to receive any such Options or Convertible Securities, then the maximum
     number of shares (as set forth in the instrument relating thereto without
     regard to any provisions contained therein for a subsequent adjustment of
     such number) of Common Stock issuable upon the exercise of such Options or,
     in the case of Convertible Securities and Options therefor, the conversion
     or exchange of such Convertible Securities, shall be deemed to be
     Additional Shares of Common Stock issued as of the time of such issue or,
     in case such a record date shall have been fixed, as of the close of
     business on such record date, provided that such Additional Shares of
     Common Stock shall not be deemed to have been issued unless the
     consideration per share (determined pursuant to Section 3(d)(v) hereof) of
     such Additional Shares of Common Stock would be less than the Conversion
     Price in effect on the date of and immediately prior to such issue, or such
     record date, as the case may be, and provided further that in any such case
     in which Additional Shares of Common Stock are deemed to be issued:

     (A)               no further adjustment in the Conversion Price shall be
                  made upon the subsequent issue of Convertible Securities or
                  shares of Common Stock upon the exercise of such Options or
                  conversion or exchange of such Convertible Securities;


                                       5
<PAGE>

     (B)               if such Options or Convertible Securities by their terms
                  provide, with the passage of time, pursuant to any provisions
                  designed to protect against dilution, or otherwise, for any
                  increase or decrease in the consideration payable to the
                  Corporation, or increase or decrease in the number of shares
                  of Common Stock issuable, upon the exercise, conversion or
                  exchange thereof, the Applicable Conversion Price computed
                  upon the original issue thereof (or upon the occurrence of a
                  record date with respect thereto), and any subsequent
                  adjustments based thereon, shall, upon any such increase or
                  decrease becoming effective, be recomputed to reflect such
                  increase or decrease insofar as it affects such Options or the
                  rights of conversion or exchange under such Convertible
                  Securities;

     (C)               upon the expiration of any such Options or any rights of
                  conversion or exchange under such Convertible Securities which
                  shall not have been exercised, the Conversion Price computed
                  upon the original issue thereof (or upon the occurrence of a
                  record date with respect thereto), and any subsequent
                  adjustments based thereon, shall, upon such expiration, be
                  recomputed as if such Options or Convertible Securities, as
                  the case may be, were never issued;

     (D)               no readjustment pursuant to clause (B) or (C) above shall
                  have the effect of increasing the Conversion Price to an
                  amount which exceeds the lower of (i) the Conversion Price on
                  the original date on which an adjustment was made pursuant to
                  this Section 3(d)(iii)(l), or (ii) the Conversion Price that
                  would have resulted from any issuance of Additional Shares of
                  Common Stock between such original adjustment date and the
                  date on which a readjustment is made pursuant to clause (B) or
                  (C) above;

     (E)               in the case of any Options which expire by their terms
                  not more than 30 days after the date of issue thereof, no
                  adjustment of the Conversion Price shall be made until the
                  expiration or exercise of all such Options, whereupon such
                  adjustment shall be made in the same manner provided in clause
                  (C) above; and

     (F)               if such record date shall have been fixed and such
                  Options or Convertible Securities are not issued on the date
                  fixed therefor, the adjustment previously made in the
                  Conversion Price which became effective on such record date
                  shall be canceled as of the close of business on such record
                  date, and thereafter the Conversion Price shall be adjusted
                  pursuant to this Section 3(d)(iii) as of the actual date
                  of their issuance.


                                       6
<PAGE>

                  (2)  STOCK DIVIDENDS, STOCK DISTRIBUTIONS AND SUBDIVISIONS.
     In the event the Corporation at any time or from time to time after the
     Original Issue Date for the Series A Preferred Stock shall declare or pay
     any dividend or make any other distribution on the Common Stock payable in
     Common Stock, or effect a subdivision of the outstanding shares of Common
     Stock (by reclassification or otherwise than by payment of a dividend in
     Common Stock), then and in any such event, Additional Shares of Common
     Stock shall be deemed to have been issued:

     (A)               in the case of any such dividend or distribution,
                  immediately after the close of business on the record date for
                  the determination of holders of any class of securities
                  entitled to receive such dividend or distribution, or 

     (B)               in the case of any such subdivision, at the close of
                  business on the date immediately prior to the date upon which
                  such corporate action becomes effective.

                       If such record date shall have been fixed and such
                  dividend shall not have been fully paid on the date fixed for
                  the payment thereof, the adjustment previously made in the
                  Conversion Price which became effective on such record date
                  shall be canceled as of the close of business on such record
                  date, and thereafter the Conversion Price shall be adjusted
                  pursuant to this Section 3(d)(iii) as of the time of actual
                  payment of such dividend.

     (iv)  ADJUSTMENT OF CONVERSION PRICE UPON ISSUANCE OF ADDITIONAL SHARES 
OF COMMON STOCK.  In the event the Corporation shall issue Additional Shares 
of Common Stock (including Additional Shares of Common Stock deemed to be 
issued pursuant to Section 3(d)(iii)(1), but excluding Additional Shares of 
Common Stock deemed to be issued pursuant to Section 3(d)(iii)(2), which 
event is dealt with in Section 3(d)(vi) hereof) without consideration or for 
a consideration per share less than the Conversion Price in effect on the 
date of and immediately prior to such issue, then such Conversion Price shall 
be reduced, concurrently with such issue, to the price determined by dividing 
(i) an amount equal to the sum of (a) the number of shares of Common Stock 
outstanding immediately prior to such issue or sale and the number of shares 
of Common Stock issuable upon conversion of all Series A Preferred Stock and 
any Convertible Securities multiplied by the then existing Conversion Price 
and (b) the consideration, if any, received by the Corporation upon such 
issue or sale, by (ii) the total number of shares of Common Stock outstanding 
immediately after such issue or sale and the number of shares of Common Stock 
issuable upon conversion of all Series A Preferred Stock and any Convertible 
Securities.

     (v)   DETERMINATION OF CONSIDERATION.  For purposes of this Section 
3(d), the consideration received by the Corporation for the issue of any 
Additional Shares of Common Stock shall be computed as follows:


                                       7
<PAGE>

                  (1)  CASH AND PROPERTY:  Such consideration shall:

     (A)               insofar as it consists of cash, be the aggregate amount
                  of cash received by the Corporation excluding amounts paid or
                  payable for accrued interest or accrued dividends;

     (B)               insofar as it consists of property other than cash, be
                  computed at the fair value thereof at the time of such issue,
                  as determined in good faith by the Board of Directors; and

     (C)               in the event Additional Shares of Common Stock are issued
                  together with other shares of securities or other assets of
                  the Corporation for a single undivided consideration, be the
                  proportion of such consideration so received allocable to such
                  Additional Shares of Common Stock, computed as provided in
                  clauses (A) and (B) above, as determined in good faith by the
                  Board of Directors.

                  (2)  OPTIONS AND CONVERTIBLE SECURITIES.  The consideration
     per share received by the Corporation for Additional Shares of Common Stock
     deemed to have been issued pursuant to Section 3(d)(iii)(l) shall be
     determined by dividing

                  (x)        the total amount, if any, received or receivable by
                       the Corporation as consideration for the issue of such
                       Options or Convertible Securities, plus the minimum
                       aggregate amount of additional consideration (as set
                       forth in the instruments relating thereto, without regard
                       to any provision contained therein for a subsequent
                       adjustment of such consideration) payable to the
                       Corporation upon the exercise of such Options or the
                       conversion or exchange of such Convertible Securities, or
                       in the case of Options for Convertible Securities, the
                       exercise of such Options for Convertible Securities and
                       the conversion or exchange of such Convertible
                       Securities, by

                  (y)        the maximum number of shares of Common Stock (as
                       set forth in the instruments relating thereto, without
                       regard to any provision contained therein for a
                       subsequent adjustment of such number) issuable upon the
                       exercise of such Options or the conversion or exchange of
                       such Convertible Securities.


                                       8
<PAGE>

     (vi)  ADJUSTMENT FOR STOCK DIVIDENDS, STOCK DISTRIBUTIONS, SUBDIVISIONS, 
COMBINATIONS OR CONSOLIDATIONS OF COMMON STOCK.

          (1)  STOCK DIVIDENDS, STOCK DISTRIBUTIONS OR SUBDIVISIONS.  In the 
     event the Corporation shall issue Additional Shares of Common Stock 
     pursuant to Section 3(d)(iii)(2) in a stock dividend, other stock 
     distribution or subdivision, the Conversion Price in effect immediately 
     prior to such stock dividend, stock distribution or subdivision shall, 
     concurrently with the effectiveness of such stock dividend, stock 
     distribution or subdivision, be proportionately decreased to adjust 
     equitably for such dividend, distribution or subdivision.

          (2)  COMBINATIONS OR CONSOLIDATIONS.  In the event the outstanding 
     shares of Common Stock shall be combined or consolidated, by 
     reclassification or otherwise, into a lesser number of shares of Common 
     Stock, the Conversion Price in effect immediately prior to such combination
     or consolidation shall, concurrently with the effectiveness of such 
     combination or consolidation, be proportionately increased to adjust 
     equitably for such combination or consolidation.

     (vii)   ADJUSTMENT FOR MERGER OR REORGANIZATION, ETC.  In case of any
consolidation or merger of the Corporation with or into another corporation or
the conveyance of all or substantially all of the assets of the Corporation to
another corporation, or any proposed reorganization or reclassification of the
Corporation (except a transaction for which provision for adjustment is
otherwise made in this Section 3), each share of Series A Preferred Stock shall
thereafter be convertible into the number of shares of stock or other securities
or property to which a holder of the number of shares of Common Stock of the
Corporation deliverable upon conversion of such Series A Preferred Stock would
have been entitled upon such consolidation, merger, conveyance, reorganization
or reclassification; and, in any such case, appropriate adjustment (as
determined by the Board of Directors) shall be made in the application of the
provisions herein set forth with respect to the rights and interest thereafter
of the holders of the Series A Preferred Stock, to the end that the provisions
set forth herein (including provisions with respect to changes in and other
adjustments of the Conversion Price) shall thereafter be applicable, as nearly
as reasonably may be, in relation to any shares of stock or other property
thereafter deliverable upon the conversion of the Series A Preferred Stock.  The
Company shall not effect any such consolidation, merger or sale unless prior to
or simultaneously with the consummation thereof the successor corporation or
purchaser, as the case may be, shall assume by written instrument the obligation
to deliver to the holder of the Series A Preferred Stock such shares of stock,
securities or assets as, in accordance with the foregoing provisions, such
holder is entitled to receive.

     Upon the occurrence of a consolidation or merger of the Corporation with or
into another corporation, or the conveyance of all or substantially all of the
assets of the Corporation to another corporation (unless upon consummation
thereof the holders of voting 

                                       9

<PAGE>

securities of the Corporation own directly or indirectly more than fifty 
percent (50%) of the voting power to elect directors of the consolidated or 
surviving or acquiring corporation), each holder of Series A Preferred Stock 
shall have the option of electing treatment of its shares of Series A 
Preferred Stock under this Section 3(d)(vii) in lieu of Section 2(d) hereof, 
notice of which election shall be submitted in writing to the Corporation at 
its principal offices no later than ten (10) business days before the 
effective date of such event; provided, however, that such notice of election 
shall not be required to be submitted less than ten (10)  business days after 
each holder of Series A Preferred Stock is given notice of such transaction 
in writing.

     (e)  NO IMPAIRMENT.  The Corporation will not, by amendment of its
Certificate of Incorporation or through any reorganization, transfer of assets,
consolidation, merger, dissolution, issue or sale of securities or any other
voluntary action, avoid or seek to avoid the observance or performance of any of
the terms to be observed or performed hereunder by the Corporation but will at
all times in good faith assist in the carrying out of all the provisions of this
Section 3 and in the taking of all such action as may be necessary or
appropriate in order to protect the Conversion Rights of the holders of the
Series A Preferred Stock against impairment.

     (f)  CERTIFICATE AS TO ADJUSTMENTS.  Upon the occurrence of each adjustment
or readjustment of the Conversion Price pursuant to this Section 3, the
Corporation at its expense shall promptly compute such adjustment or
readjustment in accordance with the terms hereof and furnish to each holder of
Series A Preferred Stock a certificate setting forth such adjustment or
readjustment and showing in detail the facts upon which such adjustment or
readjustment is based.  The Corporation shall, upon the written request at any
time of any holder of Series A Preferred Stock, furnish or cause to be furnished
to such holder a like certificate setting forth (i) all such adjustments and
readjustments theretofore made, (ii) the Conversion Price at the time in effect,
and (iii) the number of shares of Common Stock and the amount, if any, of other
property which at such time would be received upon the conversion of Series A
Preferred Stock.

     (g)  NOTICES OF RECORD DATE.  In the event of any taking by the Corporation
of a record of the holders of any class of securities for the purpose of
determining the holders thereof who are entitled to receive any dividend (other
than a cash dividend which is in the same amount per share as cash dividends
paid in previous quarters) or other distribution, the Corporation shall mail to
each holder of Series A Preferred Stock at least ten (l0) days prior to the date
thereof, a notice specifying the date on which any such record is to be taken
for the purpose of such dividend or distribution.

     (h)  COMMON STOCK RESERVED.  The Corporation shall reserve and at all times
keep available out of its authorized but unissued Common Stock, free from
preemptive or other preferential rights, restrictions, reservations,
dedications, allocations, options, other warrants and other rights under any
stock option, conversion option or similar agreement, such number of shares of
Common Stock as shall from time to time be sufficient to effect conversion of
the Series A Preferred Stock.

                                       10

<PAGE>

     (i)  NO REISSUANCE OF SERIES A PREFERRED STOCK.  Shares of Series A
Preferred Stock which are converted into shares of Common Stock as provided
herein shall not be reissued.

     (j)  ISSUE TAX.  The issuance of certificates for shares of Common Stock
upon conversion of Series A Preferred Stock shall be made without charge to the
holders thereof for any issuance tax in respect thereof, provided that the
Corporation shall not be required to pay any tax which may be payable in respect
of any transfer involved in the issuance and delivery of any certificate in a
name other than that of the holder of the Series A Preferred Stock which is
being converted.

     (k)  CLOSING OF BOOKS.  The Corporation will at no time close its transfer
books against the transfer of any Series A Preferred Stock or of any shares of
Common Stock issued or issuable upon the conversion of any shares of Series A
Preferred Stock in any manner which interferes with the timely conversion of
such Series A Preferred Stock, except as may otherwise be required to comply
with applicable securities laws.

     (l)  DEFINITION OF COMMON STOCK.  As used in this Section 3, the term
"Common Stock" shall mean and include the Corporation's authorized Common Stock,
par value $.001 per share, as constituted on the date of filing of this Restated
Certificate of Incorporation, and shall also include any capital stock of  any
class of the Corporation thereafter authorized which shall neither be limited to
a fixed sum or percentage of par value in respect of the rights of the holders
thereof to participate in dividends nor entitled to a preference in the
distribution of assets upon the voluntary or involuntary liquidation,
dissolution or winding up of the Corporation; provided that the shares of Common
Stock receivable upon conversion of shares of Series A Preferred Stock shall
include only shares designated as Common Stock of the Corporation on the date of
filing of this Restated Certificate of Incorporation.

     (m)  CONVERSION TO DEBT INSTRUMENT.  In addition to the conversion
provisions set forth in this Section 3, the holders of the Series A Preferred
Stock who are parties to the Purchase Agreement shall have the right to convert
their shares of Series A Preferred Stock into convertible promissory  notes
under the terms and as set forth in Section 7.17 of the Purchase Agreement.

                                     SECTION 4

                                     REDEMPTION

     The shares of Series A Preferred Stock are not redeemable.


                                      SECTION 5

                                    VOTING RIGHTS

                                         11

<PAGE>

     (a)  NUMBER OF VOTES.  Except as otherwise required by law and the
provisions of this Section 5, the holders of Series A Preferred Stock and the
holders of the Common Stock shall be entitled to notice of any shareholders'
meeting and to vote together as a single class of capital stock upon any matter
submitted to a shareholder for a vote, on the following basis:

          (i)  Holders of Common Stock shall have one vote per share; and

          (ii) Holders of Series A Preferred Stock shall have that number of 
     votes per share as is equal to:

               (A)  if the Average Market Price (as defined in Section 5(e) 
          below) of the Common Stock is $2.00 per share or greater,  the number
          of shares of Common Stock into which each such share of Series A 
          Preferred Stock held by such holder is convertible at the time of such
          vote;

               (B)  if the Average Market Price (as defined in Section 5(e) 
          below) of the Common Stock is less than $2.00 per share but greater 
          than or equal to $1.00 per share,  the number of shares of Common 
          Stock into which each such share of Series A Preferred Stock held by
          such holder is convertible at the time of such vote multiplied by 2.5;
          or

               (C)  if the Average Market Price (as defined in Section 5(e) 
          below) of the Common Stock is less than $1.00 per share, the number 
          of shares of Common Stock into which each such share of Series A 
          Preferred Stock held by such holder is convertible at the time of such
          vote multiplied by 5.

     (b)  ELECTION OF DIRECTORS.  The Board of Directors shall consist of 
five (5) members, which number shall not be increased above seven (7) 
without the approval or written consent of the holders of a majority of the 
outstanding shares of Series A Preferred Stock.  Except as otherwise required 
by law, the holders of Series A Preferred Stock and the holders of Common 
Stock shall be entitled to vote upon the election of directors on the 
following basis: (A) the holders of Common Stock then issued and 
outstanding, voting separately as a class, shall, by majority vote, elect 
three (3) members of the Board of Directors, and (B) the holders of Series A 
Preferred Stock then issued and outstanding, voting separately as a class, 
shall, by majority vote, elect one (1) member of the Board of Directors, 
subject to the provisions of the Shareholders' Agreement.  If less than 
240,000 shares of Series A Preferred Stock have been issued by the 
Corporation, the holders of the Common Stock then issued and outstanding 
voting as a class, shall, by majority vote, elect one (1) additional member 
of the Board of Directors.  If 240,000 or more shares of Series A Preferred 
Stock have been issued by the Corporation, the holders of the Series A 
Preferred Stock then issued and outstanding, voting separately as a class, 
shall, by majority vote, elect one (1) additional member of the Board of 
Directors, subject to the provisions of the Shareholder's Agreement.

                                       12

<PAGE>

     (c)  QUORUMS.  Except as otherwise required by law, the following shall
constitute quorums at meetings of shareholders:

          (i)  The presence in person, by teleconference or by proxy of the 
     holders of shares constituting a majority of the votes entitled to vote 
     thereat, calculated in accordance with Section 5(a) hereof, shall 
     constitute a quorum for the purpose of transaction of business at all 
     meetings of shareholders, except with respect to election of directors 
     under Section 5(b) hereof.

          (ii) For the purpose of electing directors under Section 5(b) hereof,
     (A) the presence in person, by teleconference or by proxy of the holders of
     a majority of the shares of Series A Preferred Stock entitled to vote 
     thereat shall constitute a quorum for the purpose of electing that number 
     of directors of the Board of Directors which such shareholders are entitled
     to elect pursuant to Section 5(b) hereof; and (B) the presence in person or
     by proxy of the holders of a majority of the shares of Common Stock 
     entitled to vote thereat shall constitute a quorum for the purpose of 
     electing that number of directors of the Board of Directors which such 
     shareholders are entitled to elect pursuant to Section 5(b) hereof.

     (d)  RESERVED.

     (e)  AVERAGE MARKET PRICE.  For the purpose of any computation pursuant 
to this Restated Certificate of Designation, the Average Market Price at any 
date of one share of Common Stock shall be deemed to be the average of the 
daily closing prices for the 90 consecutive business days ending no more than 
15 business days before the day in question (as adjusted for any stock 
dividend, split, combination or reclassification that took effect during such 
90 business day period).  The closing price for each day shall be the last 
reported bid price regular way on the principal national securities exchange 
on which the Common Stock is listed or admitted to trading (or if the Common 
Stock is not at the time listed or admitted for trading on any such exchange, 
then such price as shall be equal to the last reported bid  price, as 
reported by the National Association of Securities Dealers Automated 
Quotations System ("NASDAQ") on such day, or if, on any day in question, the 
security shall not be quoted on the NASDAQ, then such price shall be equal to 
the last reported bid price on such day as reported by The National Quotation 
Bureau Incorporated or any similar reputable quotation and reporting service, 
if such quotation is not reported by The National Quotation Bureau 
Incorporated); provided, however, that if the Common Stock is not traded in 
such manner that the quotations referred to in this Section 5(e) are 
available for the period required hereunder, the Average Market Price shall 
be mutually determined in good faith by agreement of the Board of Directors 
of the Company and the majority in interest of the Series A Preferred Stock 
or, if such determination cannot be made, by a nationally recognized 
independent investment banking firm agreed upon by the Board of Directors of 
the Company and a majority in interest of the Series A Preferred Stock (or if 
such selection cannot be made, by a nationally recognized independent 
investment banking firm selected by the American Arbitration Association in 
accordance with its rules).

                                       13

<PAGE>

                                     SECTION 6

                                  DIVIDEND RIGHTS

     If any cash dividends or other distributions (other than dividends in
Additional Shares of Common Stock) are declared by the Board of Directors to be
paid on the Common Stock as a class, then a dividend shall be paid at the same
time to the holders of the outstanding shares of Series A Preferred Stock at a
rate per share equal to the product of (x) such dividend or other distribution
on each share of Common Stock times (y) the number of shares of Common Stock
into which each share of Series A Preferred Stock is then convertible.

     No dividend or other distribution shall be paid on or declared or set apart
for payment on any shares of the Common Stock of the Corporation or any shares
of the Common Stock of the Corporation or any shares of any other class or
series or issue of Preferred Stock as long as any dividends payable on the
Series A Preferred Stock are in arrears.

     The term "distribution" as used in this Section 6 and in Section 7 hereof
shall include the transfer of cash or property without consideration, whether by
way of dividend or otherwise (except a dividend in shares of Common Stock), or
the purchase or redemption of shares of the Corporation (other than from
employees of the Corporation upon termination of employment or pursuant to the
Corporation's rights of first refusal, in each case upon approval of the Board
of Directors), for cash or property, including such transfer, purchase or
redemption by a subsidiary of the Corporation.  The time of any distribution by
way of dividends shall be the date of declaration thereof, and the time of any
distribution by purchase or redemption of shares shall be the date on which cash
or property is transferred by the Corporation, whether or not pursuant to a
contract of an earlier date; PROVIDED that where a debt security is issued in
exchange for shares, the time of the distribution is the date when the
Corporation acquires the shares for such exchange.


                                     SECTION 7

                                     COVENANTS

     Without limiting the rights of the holders of the Series A Preferred Stock
to vote as a class, as required by law, so long any shares of Series A Preferred
Stock shall be outstanding, the Corporation shall not, without first obtaining
the affirmative vote or written consent of not less than a majority of such
outstanding shares of Series A Preferred Stock:

     (a)  amend or repeal any provision of, or add any provision to, the
Corporation's Certificate of Incorporation or Bylaws;

                                       14

<PAGE>

     (b)  reclassify any Common Stock into shares having any preference or
priority as to dividends or assets superior to or on a parity with any such
preference or priority of the Series A Preferred Stock, or otherwise effect a
capital reorganization of either the Corporation or any subsidiary of the
Corporation;

     (c)  apply any of its assets to the redemption, retirement, purchase or
other acquisition directly or indirectly, through subsidiaries or otherwise, of
any shares of Common Stock, except from employees of the Corporation upon
termination of employment or pursuant to the Corporation's rights of first
refusal;

     (d)  consolidate or merge the Corporation or any subsidiary of the
Corporation into or with, or acquire or cause any subsidiary of the Corporation
to acquire the stock or all or substantially all the assets of, any other
corporation, partnership or other entity;

     (e)  sell, lease, convey, encumber or otherwise dispose of all or
substantially all of the property or business of the Corporation or any
subsidiary of the Corporation;

     (f)  create, authorize or issue, directly or indirectly, any Additional
Shares of Common Stock or Convertible Security, having any preference or
priority as to dividends or assets to or on a parity with any such preference or
priority of the Series A Preferred Stock; or

     (g)  pay, set aside for payment or declare any dividend or other
distribution (as defined in Section 6 hereof) on any share of Common Stock or
any shares of any other class or series or issue of Preferred Stock unless all
dividends accumulated on the Series A Preferred Stock shall have been either
paid in full or funds set aside for the payment thereof.

     Notwithstanding the foregoing, nothing herein shall require the Corporation
to obtain the consent of the Holders of Series A Preferred Stock to issue up to
96,000 shares of a new class of Preferred Stock at the sale price of not less
than $6.25 per share, which new class of Preferred Stock shall be identical in
all respects to the Series A Preferred Stock and pari passu therewith in all
respects, except that each share of such new class of Preferred Stock shall be
convertible into Common Stock based upon an initial Conversion Price of $.50 per
share of Common Stock.  The number of shares of such new class of Preferred
Stock issued shall be included in the calculation of the total number of shares
of Series A Preferred Stock issued for purposes of determining the number of
Directors to be elected by the holders of the Series A Preferred Stock (together
with the holders of such new class of Preferred Stock, once issued) in
accordance with Section 5(b).  The Holders of the Series A Preferred Stock shall
have preemptive rights to purchase such new class of Preferred Stock in the
proportion that the number of shares of Series A Preferred Stock of any such
Holder bears to the total number of shares of Series A Preferred Stock issued
and outstanding at the time such new class of Preferred Stock is offered for
sale by the Corporation.

                                       15

<PAGE>

                                     SECTION 8

                       STOCK DIVIDENDS, STOCK DISTRIBUTIONS,
                   SUBDIVISIONS, COMBINATIONS AND CONSOLIDATIONS

     In the event the Corporation shall issue additional shares of Series A
Preferred Stock in a stock dividend, other stock distribution or subdivision, or
in the event the outstanding shares of Series A Preferred Stock shall be
combined or consolidated, by reclassification or otherwise, into a lesser number
of shares of Series A Preferred Stock, (i) the amounts set forth in Section 2(a)
hereof, (ii) the Redemption Price set forth in Section 4 hereof, and (iii) the
Dividend Rate set forth in Section 6 hereof, in each case in effect immediately
prior to such event shall, concurrently therewith, be proportionately decreased
(in the case of a stock dividend, other stock distribution or subdivision) or
increased (in the case of a combination or consolidation) in each such case to
adjust equitably therefor.


                                     SECTION 9

                                  RESIDUAL RIGHTS

     All rights accruing to the outstanding shares of capital stock of the
Corporation not expressly provided for to the contrary herein shall be vested in
the Common Stock.

          IN WITNESS WHEREOF, Helisys, Inc. has caused this Restated Certificate
of Designation of Rights, Preferences & Privileges of Series A Preferred Stock
to be duly executed by its President and attested to by its Secretary as of this
10th day of September, 1998.

                                      HELISYS, INC.


                                      By:  /s/ GARY S. MOSKOVITZ
                                          --------------------------------
                                          Name:  Gary S. Moskovitz
                                          Its President


ATTEST:


By:  /s/ DAVID OKAZAKI
   -------------------------
Name:  David Okazaki
Its Secretary

                                       16


<PAGE>

                               SHAREHOLDERS' AGREEMENT


     THIS SHAREHOLDERS' AGREEMENT (this "Agreement") is made and entered into 
as of this 14th day of September, 1998, by and among Helisys, Inc., (the 
"Company"), a Delaware corporation, the Shareholders listed on Schedule I 
hereto, Walter W. Cruttenden III ("Cruttenden"), and Michael Feygin 
("Feygin").

                                W I T N E S S E T H:

     WHEREAS, the Shareholders listed on Schedule I hereto (each a "Shareholder"
and collectively the "Shareholders") have agreed to purchase from the Company
shares (the "Shares") of Preferred Stock and Warrants (as hereinafter defined)
pursuant to a certain Series A Preferred Stock Package Agreement of even date
herewith (the "Purchase Agreement");

     WHEREAS, Cruttenden is an existing holder of Preferred Stock, and Feygin is
a founder of the Company and the holder of a majority of the Company's Common
Stock and each will benefit from the Shareholders' investment in the Company;

     WHEREAS, the Shareholders, Cruttenden, Feygin and the Company have agreed
to enter into an agreement with respect to (i) the procedures to be followed in
connection with the election of the Company's Board of Directors and (ii)
certain restrictions upon the issuance by the Company of New Securities; and

     NOW, THEREFORE, in consideration of the premises and of the mutual
covenants and agreements hereinafter set forth, and to induce the Purchasers to
purchase the Shares and Warrants, and in consideration thereof, it is hereby
covenanted and agreed as follows:

                                     SECTION L

                                    DEFINITIONS

     As used herein, the following terms shall have the respective meanings
following such term:

     AFFILIATE shall mean, as to any Shareholder, (i) the partners, retired 
partners, directors and officers, as the case may be, of such Shareholder, 
(ii) the partners of any of the parties referred to in the foregoing clause 
of this definition, (iii) the spouse or lineal descendants of such 
Shareholder or any of the parties referred to in the foregoing clauses of 
this definition, (iv) a trust for the benefit of such Shareholder or any of 
the parties referred to in the foregoing clauses of this definition, (v) any 
corporation or partnership controlled by such Shareholder or by any of the 
parties referred to in the foregoing clauses of this definition, and (vi) any 
other party that directly, or indirectly through one 

<PAGE>

or more intermediaries, controls, or is controlled by, or is under common 
control with, any Shareholder.

     CERTIFICATE OF INCORPORATION shall mean the Company's Amended and Restated
Certificate of Incorporation, as amended from time to time.

     COMMON STOCK shall mean the Company's common stock, par value $.001.

     CONVERSION SHARES shall mean, at any time, (i) the issued and outstanding
shares of Preferred Stock (for purposes of calculating the number of Conversion
Shares at any time, each such share shall be deemed to be that number of shares
of Common Stock or other securities into which such share is then convertible),
(ii) the shares of Common Stock issued upon conversion of the issued and
outstanding shares of Preferred Stock owned as of the date hereof by the
Shareholders and (iii) any securities issued or issuable directly or indirectly
in respect of the aforesaid shares of Common Stock or Preferred Stock, or both,
in payment of a dividend or in connection with a stock split, recapitalization
or other similar event.

     EQUITY SECURITY shall mean any capital stock (including the Common and
Preferred Stock) of the Company, whether now authorized or not, and rights,
options, warrants or rights to purchase capital stock, and securities of any
type whatsoever that are, or may become, convertible into capital stock; the
number of shares of an Equity Security which is an option, warrant, right or
convertible security shall be the number of shares of such Equity Security which
would result upon the immediate exercise of such option, warrant or right of
conversion of such convertible security, without regard to when such option,
warrant or right may in fact be exercised or such convertible security may in
fact be converted.

     NEW SECURITIES shall mean any Equity Securities hereafter issued; provided,
however, that such term shall not include (i) securities purchased under the
Purchase Agreement; (ii) securities offered to the public pursuant to a
registration statement filed in accordance with the provisions of the Securities
Act; (iii) securities issued in connection with the acquisition of another
corporation by the Company by merger, purchase of substantially all assets or
other reorganization whereby the Company owns, upon consummation of such
acquisition, greater than fifty percent (50%) of the voting power to elect the
directors of such corporation; (iv) securities issued in any merger or
consolidation of the Company, provided that such merger or consolidation is
approved by the holders of not less than seventy-five percent (75%) of the
Conversion Shares; (v) securities evidencing any borrowings, direct or indirect,
from financial institutions or other persons by the Company, whether or not
presently authorized, including any type of loan or payment evidenced by any
type of debt instrument, provided such securities do not have equity features
(such as warrants, options or other rights to purchase capital stock) and are
not convertible into capital stock of the Company; (vi) securities issued
pursuant to any stock option plan, stock purchase or stock bonus arrangement, or

                                       2

<PAGE>

grant; and (vii) securities issued to financial institutions and leasing
companies in connection with borrowing or lease financing arrangements of the
Company, provided that such issuances or grants are unanimously approved by the
Board of Directors.

     PREEMPTIVE SHARE shall mean, immediately prior to any issue of New
Securities, and as to each Shareholder, the percentage which expresses the ratio
between (i) the number of Equity Securities owned at such time by such
Shareholder, and (ii) the aggregate number of Equity Securities outstanding at
such time.

     PREFERRED STOCK shall mean the Company's Series A Preferred Stock, par
value $.001 per share.

     PURCHASE AGREEMENT shall mean the Series A Preferred Stock Purchase
Agreement, dated as of the date hereof, among the Company and the Purchasers,
including any supplemental agreements executed in accordance with Section 2.2 of
the Purchase Agreement..

     SECURITIES ACT shall mean the Securities Act of l933, as amended, and any
successor statute thereto.

     SELL, as to any Equity Security, shall mean to sell, or in any other way
directly or indirectly transfer, assign, distribute, encumber or otherwise
dispose of such Equity Security, either voluntarily or involuntarily.

     SHAREHOLDERS shall mean the persons listed on Schedule I hereto and shall
include any other party who agrees in writing with the parties hereto to be
bound by and to comply with all applicable provisions of this Agreement.

     WARRANTS shall mean the Warrants to purchase up to an aggregate of 900,000
shares of Common Stock, $.001 par value per share, of the Company, issued
pursuant to the Purchase Agreement.



                                     SECTION 2

                               ELECTION OF DIRECTORS

SECTION 2.1.  DESIGNATION OF NOMINEES.

                                       3

<PAGE>

     (a)  So long as a Shareholder named below shall continue to hold (with any
members of its Shareholder) no less than thirty-five (35%) of the shares of
Preferred Stock originally acquired by it, such Shareholder shall be entitled,
but shall be under no obligation, to designate one nominee for election to the
Board of Directors by the Shareholders:

                         Telantis Venture Partners V, Inc.

     (b)  In the event a designation is not made by Telantis Venture Partners V,
Inc. in accordance with this Section 2.1, unless otherwise agreed by such
Shareholder, the Shareholders will use their best efforts to ensure that such
position on the Board of Directors shall be left vacant until a nominee is so
designated.

     SECTION 2.2.  VOTING FOR NOMINEES.  Each Shareholder and Cruttenden agrees
to vote the Equity Securities held by it from time to time for the nominees so
designated in accordance with Section 2.1 at each annual meeting of shareholders
of the Company, and at any special meeting of shareholders of the Company called
for the election of directors, in such manner as may be required to elect such
nominees.  Cruttenden agrees to vote in accordance with the majority vote of the
Shareholders with respect to the election for any position on the Board of
Directors.

     SECTION 2.3.  OBLIGATIONS OF COMPANY AND FEYGIN.  The Company agrees to use
its best efforts to cause the nominees so designated in accordance with Section
2.1 to be included in part of the slate of directors and to be recommended to,
and elected by shareholders, at each annual meeting of shareholders of the
Company, and at any special meeting of shareholders of the Company called for
the election of directors.  In the event of exchange of Series A Preferred Stock
for Exchange Notes (as defined in the Purchase Agreement) in accordance with
Section 7.17 of the Purchase Agreement, the Company agrees to the foregoing on
the same basis as if such exchange had not occurred.  Feygin agrees to vote the
shares of Equity Securities held by or controlled by him in favor of the
designee (if the Shareholders are entitled to elect one director) or designees
(if the Shareholders are entitled to elect more than one director) of the
Shareholders.

     SECTION 2.4.  REMOVAL; ELECTION OF SUCCESSORS.  If (a) the Company receives
a written notice that Shareholders holding a majority of the voting power of the
Equity Securities held by the Shareholders wish to remove a director elected
pursuant to Section 2.1, or (b) such director shall have resigned or shall be
unable to serve, then, in any such case, the Company and the Shareholders agree
to take such action as may be necessary to call a special meeting of the
stockholders of the Company for the purpose of effecting any such removal or
filling such vacancy, as the case may be, and at such meeting each Shareholder
shall vote to accomplish said result.

     SECTION 2.5.  PROXY.  If any Shareholder shall refuse to vote the Equity
Securities held by it as provided in any of the foregoing Sections of this
Section 2 at any meeting of shareholders of the 

                                       4

<PAGE>

Company, or shall refuse to give its written consent in lieu of a meeting, 
thereupon, without further action by such Shareholder, the President or any 
Vice President of the Company shall be, and hereby is, irrevocably 
constituted the attorney-in-fact and proxy of such Shareholder for the 
purpose of voting, and shall vote such shares at such meeting as provided in 
the foregoing Sections of this Section 2 or give such consent, as the case 
may be.

                                     SECTION 3

                       SALE OF NEW SECURITIES BY THE COMPANY

     Except as otherwise expressly provided herein, the Company hereby agrees
that it shall not Sell any New Securities except in accordance with the
following procedures:

     (a)  The Company shall first deliver to each Shareholder a written Notice
of Intention To Sell, which shall be irrevocable for a period of twenty (20)
days after delivery thereof, offering to each Shareholder the right to purchase
up to its Preemptive Share of such New Securities at the purchase price and on
the terms specified therein.  Each Shareholder shall have the right and option,
for a period of thirty (30) days after delivery to Shareholders of such Notice
of Intention To Sell, to purchase all or any part of the New Securities so
offered at the purchase price and on the terms stated therein.  Such acceptance
shall be made by delivering a written Notice of Acceptance to the Company within
the aforesaid thirty (30) day period.

     (b)  If any Shareholder shall fail to accept, or shall reject in writing,
the offer made pursuant to Section 3(a), then, upon the earlier of the
expiration of the aforesaid thirty (30) day period or the receipt of Notices of
Acceptance, or written rejections of such offer, from all Shareholders, the then
remaining New Securities formerly subject to such offer shall be reoffered to
all other Shareholders, if any, which shall have accepted their Preemptive Share
of such original offer.  Such subsequent offer shall be on the terms and subject
to acceptance in the manner provided in Section 3(a), except that the
Shareholders receiving such subsequent offer shall have (i) the right and option
to accept such offer with respect to all of the then remaining New Securities
subject thereto PRO RATA in accordance with their respective Preemptive Shares,
for a period of seven (7) business days, and (ii) the further right and option
to offer, in any Notice of Acceptance, to purchase any of such New Securities
not purchased by other Shareholders, in which case such New Securities not
accepted by other Shareholders shall be deemed to have been offered to and
accepted by the Shareholders which have exercised their option under this clause
(ii), PRO RATA, in accordance with their respective Preemptive Shares, and on
the above-described terms and conditions.

     (c)  The closing of any sales of New Securities under the terms of Section
3(a) shall be made at the offices of the Company on a mutually satisfactory
business day within fourteen (14) days after 

                                       5

<PAGE>

the expiration of the aforesaid periods.  Delivery of certificates or other 
instruments evidencing such New Securities duly endorsed for transfer to the 
Shareholders shall be made on such date against payment of the purchase price 
therefor.

     (d)  If effective acceptance shall not be received pursuant to Section 3(a)
above with respect to all New Securities offered for sale pursuant to a Notice
of Intention To Sell, then the Company may sell all or any part of the remaining
New Securities so offered for sale at a price not less than the price, and on
terms not more favorable to the purchaser thereof than the terms stated in the
original Notice of Intention To Sell, at any time within one hundred twenty
(l20) days after the expiration of the offer required by Section 3(a) above.  In
the event the remaining New Securities are not sold by the Company during such
one hundred twenty (l20) day period, the right of the Company to sell such
remaining New Securities shall expire and the obligations of this Section 3
shall be reinstated; provided, however, that in the event the Company
determines, at any time during such one hundred twenty (l20) day period, that
the sale of all or any part of the remaining New Securities on the terms set
forth in the Notice of Intention To Sell is impractical, the Company can
terminate the offer and reinstate the procedure provided in this Section 3
without waiting for the expiration of such one hundred twenty (l20) day period.


                                     SECTION 4

                    TRANSFER OF SHARES; COVENANTS OF THE COMPANY

     SECTION 4.L.  TRANSFER BY SHAREHOLDERS.  No Shareholder shall sell, assign,
transfer, pledge, encumber or otherwise dispose of, whether by operation of law
or otherwise, any Equity Securities unless any such transfer is made to a
transferee who concurrently is or prior to such transfer becomes a party to this
Agreement.

     SECTION 4.2.  REGISTRATION OF TRANSFER.  The Company shall permit
registration of transfer of Equity Securities held by a Shareholder only in
accordance with the terms of this Agreement.  Any transfer of Equity Securities
which is made in any manner contrary to the provisions of this Agreement shall
be void and shall not be effective to constitute the transferee as a shareholder
of the Company entitled to any rights, benefits, and privileges as such.

     SECTION 4.3.    LEGEND.  Each certificate of Common Stock or Preferred
Stock and certificates representing other Equity Securities of the Company, held
by a Shareholder, shall be stamped or otherwise have endorsed or imprinted
thereon a legend in substantially the following form:


                                       6
<PAGE>

     "The transfer of the shares represented by this certificate, and the 
rights of the holder hereof, are subject to the terms and conditions of a 
Shareholders' Agreement, dated as of September 14, 1998 (a copy of which is 
on file with the Company), as the same may be amended from time to time, and 
no transfer of the shares represented hereby or of shares issued in exchange 
therefor shall be valid or effective unless the terms and conditions of such 
Agreement have been fulfilled."

     SECTION 4.4.  "MARKET STAND-OFF" AGREEMENT.  Feygin agrees that he shall 
not Sell any Equity Security at any time owned by him or of which he is at 
any time the "Beneficial Owner," as that term is defined in Rule 13d-3 of the 
Rules and Regulations under the Securities Exchange Act of 1934, except in 
accordance with the volume limitations applicable to "affiliates" of the 
Company as set forth in Rule 144 of the Rules and Regulations under the 
Securities Act of 1933, regardless of whether Feygin falls within the meaning 
of "affiliate" under said Rule 144.  Additionally, during the twelve-month 
period commencing as of the date hereof, Feygin may only sell shares with an 
aggregate sale price of up to $100,000  provided that: (i) the price per 
share in any transaction is not less than $1.00; (ii) such sale is otherwise 
in compliance with all federal and state securities laws and regulations; and 
(iii) Feygin has first offered to sell such shares to the Shareholders in 
accordance with Section 4.5.  Notwithstanding the foregoing, at any time 
Feygin is not an employee of the Company, he may only sell any Equity 
Security with the consent of the majority in interest of the Shareholders.

     SECTION 4.5.  RIGHT OF FIRST OFFER.  Feygin hereby agrees that he shall 
not Sell any Equity Security except in accordance with Section 4.4 and with 
the following procedures

     (a)  Feygin shall first deliver to each Shareholder a written Notice of 
Intention To Sell, which shall be irrevocable for a period of twenty (20) days 
after delivery thereof, offering to each Shareholder the right to purchase up 
to its Preemptive Share of the shares proposed to be sold (the "Feygin Sale 
Shares") at the purchase price and on the terms specified therein.  Each 
Shareholder shall have the right and option, for a period of thirty (30) days 
after delivery to Shareholders of such Notice of Intention To Sell, to 
purchase all or any part of the Feygin Sale Shares so offered at the purchase 
price and on the terms stated therein.  Such acceptance shall be made by 
delivering a written Notice of Acceptance to Feygin within the aforesaid 
thirty (30) day period.

     (b)  If any Shareholder shall fail to accept, or shall reject in 
writing, the offer made pursuant to Section 4.5(a), then, upon the earlier of 
the expiration of the aforesaid thirty (30) day period or the receipt of 
Notices of Acceptance, or written rejections of such offer, from all 
Shareholders, the then remaining Feygin Sale Shares formerly subject to such 
offer shall be reoffered to all other Shareholders, if any, which shall have 
accepted their Preemptive Share of such original offer.  Such subsequent 
offer shall be on the terms and subject to acceptance in the manner provided 
in Section 4.5(a), except that the Shareholders receiving such subsequent 
offer shall have (i) the right and option to accept such offer with respect 
to all of the then remaining Feygin Sale Shares subject thereto PRO RATA in 
accordance with their respective Preemptive Shares, for a period of seven 
(7) business days, 


                                       7

<PAGE>

and (ii) the further right and option to offer, in any Notice of Acceptance, 
to purchase any of such Feygin Sale Shares not purchased by other 
Shareholders, in which case such Feygin Sale Shares not accepted by other 
Shareholders shall be deemed to have been offered to and accepted by the 
Shareholders which have exercised their option under this clause (ii), PRO 
RATA, in accordance with their respective Preemptive Shares, and on the 
above-described terms and conditions.

     (c)  The closing of any sales of Feygin Sale Shares under the terms of 
Section 4.5(a) shall be made at the offices of the Company on a mutually 
satisfactory business day within fourteen (14) days after the expiration of 
the aforesaid periods.  Delivery of certificates or other instruments 
evidencing such Feygin Sale Shares duly endorsed for transfer to the 
Shareholders shall be made on such date against payment of the purchase price 
therefor.

     (d)  If effective acceptance shall not be received pursuant to 
Section 4(a) above with respect to all Feygin Sale Shares offered for sale 
pursuant to a Notice of Intention To Sell, then Feygin may sell all or any 
part of the remaining Feygin Sale Shares so offered for sale at a price not 
less than the price, and on terms not more favorable to the purchaser thereof 
than the terms stated in the original Notice of Intention To Sell, at any 
time within one hundred twenty (l20) days after the expiration of the offer 
required by Section 4.5(a) above.  In the event the remaining Feygin Sale 
Shares are not sold by Feygin during such one hundred twenty (l20) day 
period, the right of Feygin to sell such remaining Feygin Sale Shares shall 
expire and the obligations of this Section 4.5 shall be reinstated; provided, 
however, that in the event Feygin determines, at any time during such one 
hundred twenty (l20) day period, that the sale of all or any part of the 
remaining Feygin Sale Shares on the terms set forth in the Notice of 
Intention To Sell is impractical, Feygin can terminate the offer and 
reinstate the procedure provided in this Section 4 without waiting for the 
expiration of such one hundred twenty (l20) day period.


                                       8

<PAGE>

                                   SECTION 5

                                   DURATION

     The provisions of this Agreement shall be of no further force or effect 
(i) upon the closing of the first sale of Common Stock to the public pursuant 
to a registration statement filed with, and declared effective by, the 
Securities and Exchange Commission under the Securities Act, with gross 
proceeds to the Company as seller of not less than twenty million dollars 
($20,000,000) before deducting underwriting commissions, provided the sale 
price to the public per share of Common Stock is not less than $3.00 per 
share, or (ii) at such time as 75% of the Series A Preferred Stock 
outstanding as of the date hereof and any Exchange Notes exchanged therefor 
are no longer outstanding.  In addition, the provisions of Section 2 of this 
Agreement shall be of no further force or effect upon the date which is ten 
(l0) years from the date hereof.

                                   SECTION 6

                           MISCELLANEOUS PROVISIONS

     SECTION 6.1.  ASSIGNMENT OF RIGHTS.  The provisions of this Agreement 
shall be binding upon and inure to the benefit of any successor or assign of 
any party hereto.

     SECTION 6.2.  DURATION OF AGREEMENT.  Unless sooner terminated in 
accordance with the provisions of this Agreement, the rights and obligations 
of each Shareholder under this Agreement shall terminate as to such 
Shareholder when the Shareholder has transferred all Equity Securities owned 
by such Shareholder in accordance with this Agreement.

     SECTION 6.3.  ENFORCEMENT.  The parties hereto agree that the remedy at 
law for any breach of this Agreement is inadequate and that should any 
dispute arise concerning any matter hereunder, this Agreement shall be 
enforceable in a court of equity by an injunction or a decree of specific 
performance.  Such remedies shall, however, be cumulative and not exclusive, 
and shall be in addition to any other remedies which the parties hereto may 
have.

     SECTION 6.4.  SEVERABILITY OF PROVISIONS.  If any one or more provisions 
of this Agreement shall be declared invalid or unenforceable, the same shall 
not affect the validity or enforceability of any other provisions of this 
Agreement.

     SECTION 6.5.  AMENDMENTS.  Neither this Agreement nor any term hereof 
may be amended, waived, discharged, or terminated, except by written 
instrument signed by the Company and Shareholders holding greater than 
seventy-five percent (75%) of the voting Equity Securities held by 


                                       9

<PAGE>

the Shareholders; PROVIDED, HOWEVER, that (i) the provisions of Section 2.1 
may not be amended without the consent of the Shareholders named in, or 
entitled to the benefit of, Section 2.1(a); (ii) the periods set forth in 
Section 5 may not be extended without the consent of each and every 
Shareholder; (iii) this Section may not be amended without the consent of 
each and every Shareholder; and (iv) the obligations of any Shareholder may 
not be increased without the consent of such Shareholder.

     SECTION 6.6.  NOTICES.

     (a)  All notices and other communications required or permitted 
hereunder shall be in writing and (unless otherwise expressly provided on 
Schedule I attached hereto) shall be mailed by registered or certified mail, 
postage prepaid, or delivered either by hand or by messenger, or sent via 
telex, telecopier, computer mail or other electronic means, addressed (i) if 
to a Shareholder, as indicated on Schedule I, or at such other address as 
such Shareholder shall have furnished in writing to the party initiating the 
notice or communication,  (ii) if to the Company, Helisys, Inc., Attention: 
President, 24015 Garnier Street, Torrance, CA 90505, or at such other address 
as the Company shall have furnished in writing to the party initiating the 
notice or communication, or (iii) if to Michael Feygin, c/o Helisys, Inc., 
24015 Garnier Street, Torrance, CA 90505, or at such other address as 
Mr. Feygin shall have furnished in writing to the party initiating the notice 
or communication..

     (b)  Any notice or other communications so addressed and mailed, postage 
prepaid, by registered or certified mail (in each case, with return receipt 
requested) shall be deemed to be delivered and given when so mailed.  Any 
notice so addressed and otherwise delivered shall be deemed to be given when 
actually received by the addressee.

     SECTION 6.7.  GOVERNING LAW.  This Agreement shall be construed in 
accordance with, and the rights of the parties shall be governed by, the law 
of the State of Delaware, without regard to the choice of law provisions 
thereof..

     SECTION 6.8.  ENTIRE AGREEMENT.  All prior understandings and agreements 
between the parties hereto with respect to the transactions contemplated 
hereby are merged in this Agreement, and this Agreement reflects all the 
understandings with respect to such transactions.  Nothing herein contained 
shall be construed to obligate the Shareholders to make any additional 
investment in the Company or to constitute the Shareholders as partners.

     SECTION 6.9.  COUNTERPARTS.  This Agreement may be executed in 
counterparts, each of which when so executed and delivered shall constitute a 
complete and original instrument but all of which 


                                       10

<PAGE>

together shall constitute one and the same agreement, and it shall not be 
necessary when making proof of this Agreement or any counterpart thereof to 
account for any other counterpart.

     IN WITNESS WHEREOF, each party hereto has caused this Agreement to be 
signed by its duly authorized officer or partner, as the case may be, as of 
the date and year first above written.


                                       HELISYS, INC.


                                       By: /s/ Gary S. Moskovitz
                                          --------------------------------------
                                       Name: Gary S. Moskovitz
                                       Its:  President and CEO


                                       /s/ Michael Feygin
                                       -----------------------------------------
                                       Michael Feygin, Individually


                                       /s/ Walter W. Cruttenden III
                                       -----------------------------------------
                                       Walter W. Cruttenden III, Individually


                                       PURCHASERS:

                                       TELANTIS VENTURE PARTNERS V, INC.


                                       By: /s/ Adam H. Meyerson
                                          --------------------------------------
                                       Name: Adam H. Meyerson
                                       Its:  President


                                       VISALIA TRUST


                                       By: /s/ Reed L. Harman
                                          --------------------------------------
                                       Name: Reed L. Harman
                                       Its:


                                       11

<PAGE>

                                  SCHEDULE I

                           SCHEDULE OF SHAREHOLDERS


NAME AND ADDRESS

Telantis Venture Partners V, Inc.
791 Wye Road
Akron, OH 44333
(330) 664-2914


Visalia Trust
1820 Via Visalia
Palos Verdes, CA 90274
(310) 373-7538


                                       12



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