3 D SYSTEMS CORP
S-8, 1998-07-10
PREPACKAGED SOFTWARE
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933


                             3D SYSTEMS CORPORATION
             (Exact Name of Registrant as Specified in Its Charter)


Delaware                                                 95-4431352
(State or Other Jurisdiction of             (I.R.S. Employer Identification No.)
Incorporation or Organization) 

                               26081 Avenue Hall
                           91355 Valencia, California
               (Address of Principal Executive Offices) (Zip Code)

            3D Systems Corporation 1998 Employee Stock Purchase Plan
                            (Full Title of the Plan)

              A. Sidney Alpert, Vice President and General Counsel
                             3D Systems Corporation
                                26081 Avenue Hall
                           Valencia, California 91355
                     (Name and Address of Agent for Service)

                                 (805) 295-5600
          (Telephone Number, Including Area Code, of Agent for Service)

                                   Copies to:
                               Amir Ohebsion, Esq.
                      Troop Meisinger Steuber & Pasich, LLP
                            10940 Wilshire Boulevard
                          Los Angeles, California 90024
                                 (310) 824-7000


                         CALCULATION OF REGISTRATION FEE


                                 Proposed Maximum Proposed Maximum
Title of Securities Amount to be Offering Price   Aggregate Offering   Amount of
 to Be Registered   Registered    Per Share           Price     Registration Fee
- --------------------------------------------------------------------------------
Common Stock    600,000 Shares    $9.47 (1)       $ 5,682,000 (1)        $ 1,677
$0.001 par value

================================================================================

(1) Estimated solely for purposes of calculating the registration fee pursuant
to Rule 457(h)(1) under the Securities Act of 1933, as amended,  and based upon
the  average  of the high  and low  prices  of the  Common  Stock on the  Nasdaq
National Market on July 6, 1998.


<PAGE>



                                     PART I*


                INFORMATION REQUIRED IN SECTION 10(A) PROSPECTUS


ITEM 1.   PLAN INFORMATION.

ITEM 2.   REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION.

          *      Information  required by Part I to be  contained in the Section
                 10(a) prospectus is omitted from the Registration  Statement in
                 accordance  with Rule 428 under the  Securities Act of 1933, as
                 amended, and the Note to Part I of Form S-8.


                                     PART II

ITEM 3.   INCORPORATION OF DOCUMENTS BY REFERENCE.

   The following documents filed by the Company with the Commission are
incorporated herein by reference:

   (a)    The Company's Annual Report on Form 10-K for the fiscal year ended 
          December 31, 1997 filed with the Commission on March 27, 1998.

   (b)    The Company's Quarterly Report on Form 10-Q, filed May 11, 1998.

   (c)    The Company's Current Reports on Form 8-K, filed March 9, 1998, April
          29, 1998 and June 8, 1998.

   (d)    The  description  of the Common Stock  contained  in the  Registration
          Statement on Form S-2, dated May 10, 1995, as amended by Amendment No.
          1,  dated May 25,  1995,  Amendment  No.2,  dated June 13,  1995,  and
          Amendment No. 3, dated June 19, 1995.

   (e)    All documents  subsequently  filed by Registrant  pursuant to Sections
          13(a),  13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as
          amended,  prior to the  filing  of a  post-effective  amendment  which
          indicates  that  all  securities  offered  have  been  sold  or  which
          deregisters all securities then remaining  unsold,  shall be deemed to
          be incorporated by reference in this Registration  Statement and to be
          part hereof from the date of filing of such documents.

ITEM 4.          DESCRIPTION OF SECURITIES.

   The securities to be offered are registered  under Section 12 of the Exchange
Act of 1934, as amended.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

   None.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

   Article Nine of the Registrant's Certificate of Incorporation and Article Six
of its  Bylaws  provide  for  the  indemnification  by the  Registrant  of  each
director, officer and employee of the Registrant to the fullest extent permitted
by the Delaware General  Corporation Law, as the same exists or may hereafter be
amended.  Section  145 of the  Delaware  General  Corporation  Law  provides  in
relevant part that a corporation  may indemnify any person who was or is a party
or is  threatened  to be made a party to any  threatened,  pending or  completed
action,  suit  or  proceeding,   whether  civil,  criminal,   administrative  or
investigative  (other than an action by or in the right of the  corporation)  by
reason of the fact that such person is or was a director,  officer,  employee or
agent of the corporation, or is or was serving at the request of the corporation
as a director,  officer, employee or agent of another corporation,  partnership,
joint venture, trust or other enterprise, against expenses (including attorneys'
fees),  judgments,  fines and amounts paid in settlement actually and reasonably
incurred by such

<PAGE>



person in connection  with such action,  suit or proceeding if such person acted
in good faith and in a manner  such person  reasonably  believed to be in or not
opposed to the best  interests  of the  corporation,  and,  with  respect to any
criminal action or proceeding,  had no reasonable cause to believe such person's
conduct was unlawful.

   In addition, Section 145 provides that a corporation may indemnify any person
who was or is a party or is  threatened  to be made a party  to any  threatened,
pending or  completed  action or suit by or in the right of the  corporation  to
procure a judgment in its favor by reason of the fact that such person is or was
a director,  officer, employee or agent of the corporation, or is or was serving
at the request of the corporation as a director,  officer,  employee or agent of
another  corporation,  partnership,  joint  venture,  trust or other  enterprise
against expenses (including attorneys' fees) actually and reasonably incurred by
such person in connection  with the defense or settlement of such action or suit
if such  person  acted in good  faith  and in a manner  such  person  reasonably
believed to be in or not opposed to the best  interests of the  corporation  and
except that no  indemnification  shall be made in respect of any claim, issue or
matter as to which  such  person  shall have been  adjudged  to be liable to the
corporation unless and only to the extent that the Delaware Court of Chancery or
the  court  in which  such  action  or suit was  brought  shall  determine  upon
application  that,  despite the adjudication of liability but in view of all the
circumstances  of the case,  such  person is fairly and  reasonably  entitled to
indemnity for such expenses  which the Delaware  Court of Chancery or such other
court shall deem  proper.  Delaware  law further  provides  that  nothing in the
above-described  provisions  shall be deemed  exclusive  of any other  rights to
indemnification  or  advancement of expenses to which any person may be entitled
under any bylaw,  agreement,  vote of stockholders or disinterested directors or
otherwise.

   Article Nine of the Company's  Certificate of  Incorporation  provides that a
director  of the  Registrant  shall  not be  liable  to  the  Registrant  or its
stockholders  for monetary  damages for breach of fiduciary  duty as a director.
Section  102(b)(7)  of the Delaware  General  Corporation  Law  provides  that a
provision so limiting the personal  liability of a director  shall not eliminate
or limit the liability of a director for, among other things: breach of the duty
of loyalty;  acts or omissions  not in good faith or which  involve  intentional
misconduct or a knowing violation of the law; unlawful payment of dividends; and
transactions from which the director derived an improper personal benefit.

   The Registrant has entered into separate but identical  indemnity  agreements
(the  "Indemnity  Agreements")  with each director of the Registrant and certain
officers  of the  Registrant  (the  "Indemnitees").  Pursuant  to the  terms and
conditions  of  the  Indemnity  Agreements,   the  Registrant  indemnified  each
Indemnitee  against any amounts which he or she becomes legally obligated to pay
in  connection  with any  claim  against  him or her  based  upon any  action or
inaction  which he or she may commit,  omit or suffer while acting in his or her
capacity as a director  and/or  officer of the  Registrant or its  subsidiaries,
provided,  however,  that  Indemnitee  acted  in  good  faith  and  in a  manner
Indemnitee  reasonably believed to be in or not opposed to the best interests of
the Company and, with respect to any criminal action, had no reasonable cause to
believe Indemnitee's Conduct was unlawful.

   Insofar as indemnification  for liabilities  arising under the Securities Act
may  be  permitted  to  directors,  officers  and  controlling  persons  of  the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

   Not applicable.

ITEM 8.  EXHIBITS.

4.1       3D Systems Corporation 1998 Employee Stock Purchase Plan.

5.1       Opinion of Troop, Meisinger, Steuber & Pasich, LLP.

23.1      Consent of Coopers & Lybrand LLP.

23.2      Consent of Troop, Meisinger, Steuber & Pasich, LLP 
          (included in its opinion as Exhibit 5.1).

24.1      Power of Attorney (included on signature page).

<PAGE>



ITEM 9.  UNDERTAKINGS.

   The undersigned registrant hereby undertakes as follows:

          (1)    To file,  during any period in which  offers or sales are being
                 made, a post-effective amendment to this Registration Statement
                 to include any material information with respect to the plan of
                 distribution  not  previously  disclosed  in  the  Registration
                 Statement or any material  change to such  information  in this
                 Registration Statement;

          (2)    That,  for the purpose of determining  any liability  under the
                 Securities  Act, each such  post-effective  amendment  shall be
                 deemed  to be a new  registration  statement  relating  to  the
                 securities offered therein, and the offering of such securities
                 at that  time  shall be  deemed  to be the  initial  bona  fide
                 offering thereof;

          (3)    To  remove  from  registration  by  means  of a  post-effective
                 amendment any of the securities  being  registered which remain
                 unsold at the termination of this offering; and

          (4)    That,  for  purposes of  determining  any  liability  under the
                 Securities Act of 1933, each filing of the Registrant's  annual
                 report  pursuant  to Section  13(a) or 15(d) of the  Securities
                 Exchange Act of 1934, as amended (and, where  applicable,  each
                 filing of an employee  benefit plan's annual report pursuant to
                 Section  15(d)  of the  Securities  Exchange  Act of  1934,  as
                 amended) that is incorporated by reference in the  registration
                 statement  shall be deemed to be a new  registration  statement
                 relating to the securities offered therein, and the offering of
                 such  securities at that time shall be deemed to be the initial
                 bona fide offering thereof.

          Insofar  as   indemnification   for  liabilities   arising  under  the
   Securities Act of 1933, as amended,  may be permitted to directors,  officers
   or  controlling   persons  of  the  Registrant   pursuant  to  the  foregoing
   provisions, or otherwise, the Registrant has been advised that in the opinion
   of the Securities and Exchange  Commission  such  indemnification  is against
   public policy as expressed in the Securities Act of 1933, as amended, and is,
   therefore,  unenforceable.  In the  event  that a claim  for  indemnification
   against  such  liabilities  (other  than the  payment  by the  Registrant  of
   expenses incurred or paid by a director, officer or controlling person of the
   Registrant in the  successful  defense of any action,  suit or proceeding) is
   asserted by such director,  officer or controlling  person in connection with
   the securities being  registered,  the Registrant will, unless in the opinion
   of its counsel the matter has been settled by controlling  precedent,  submit
   to  a  court  of   appropriate   jurisdiction   the  question   whether  such
   indemnification by it is against public policy as expressed in the Securities
   Act of 1933, as amended,  and will be governed by the final  adjudication  of
   such issue.

<PAGE>



                                   SIGNATURES

          Pursuant  to the  requirements  of the  Securities  Act  of  1933,  as
amended, the Registrant certifies that it has reasonable grounds to believe that
it meets all of the requirements for filing on Form S-8 and has duly caused this
registration statement to be signed on its behalf by the undersigned,  thereunto
duly authorized,  in the City of Valencia, State of California, on this 30th day
of June 1998.


                             3D SYSTEMS CORPORATION
                                  (Registrant)


                         By:    /s/ Arthur B. Sims
                               -----------------------
                                    Arthur B. Sims
                                Chief Executive Officer


                                POWER OF ATTORNEY

        Each person whose signature appears below constitutes and appoints
Arthur B. Sims and A. Sidney  Alpert,  and each of them,  as his true and lawful
attorneys-in-fact and agents with full power of substitution and resubstitution,
for him and his name, place and stead, in any and all capacities, to sign any or
all  amendments  (including  post-effective  amendments)  to  this  Registration
Statement  and to  file  a new  registration  statement  under  Rule  461 of the
Securities  Act of 1933,  as amended,  and to file the same,  with all  exhibits
thereto,  and other documents in connection  therewith,  with the Securities and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and necessary to be done in and about the  foregoing,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming  all that said  attorneys-in-fact  and agents,  or either of them, or
their substitutes, may lawfully do or cause to be done by virtue hereof.

          Pursuant  to the  requirements  of the  Securities  Act  of  1933,  as
amended,  this  registration  statement  has been signed below by the  following
persons in the capacities and on the date indicated.


Signature                            Title                           Date
- -------------------------------------------------------------------------------

 /s/ Arthur B. Sims           President, Chief Executive           June 30, 1998
- ---------------------
  Arthur B. Sims              Officer and Director
 /s/ Frank J. Spina           Chief Financial Officer              June 29, 1998
- ---------------------
  Frank J. Spina              and Accounting Officer
 /s/ Charles W. Hull          Chief Technical Officer              June 30, 1998
- ---------------------
  Charles W. Hull             and Director
 /s/ Miriam V. Gold           Director                              July 6, 1998
- ---------------------
  Miriam V. Gold
 /s/ Donald S. Bates          Director                              July 2, 1998
- ---------------------
  Donald S. Bates
 /s/ Jim D. Kever             Director                              July 7, 1998
- ----------------------
  Jim D. Kever
 /s/ Richard D. Balanson      Chief Operating Officer,              July 8, 1998
- ------------------------
   Richard D. Balanson        President and Director





<PAGE>




                                  EXHIBIT INDEX



EXHIBIT NO.            EXHIBIT DESCRIPTION                        SEQUENTIALLY
- -----------            -------------------                        ------------
                                                                 NUMBERED PAGE
                                                                 -------------

4.1         3D Systems Corporation 1998 Employee Stock Purchase Plan.

5.1         Opinion of Troop, Meisinger, Steuber & Pasich, LLP.

23.1        Consent of Coopers & Lybrand L.L.P.

23.2        Consent of Troop, Meisinger, Steuber & Pasich, LLP (included in its
            opinion as Exhibit 5.1).

24.1        Power of Attorney (included on signature page).








<PAGE>




                                                                     EXHIBIT 4.1


                             3D SYSTEMS CORPORATION
                        1998 EMPLOYEE STOCK PURCHASE PLAN


1.       PURPOSE.

         This 1998  Employee  Stock  Purchase  Plan (the  "Plan") is intended to
provide incentive to, and to encourage stock ownership by, selected employees of
3D  Systems  Corporation,  a  Delaware  corporation  (the  "Company"),  and  any
"Subsidiary"  or  "Parent"  thereof,  so  that  such  employees  may  acquire  a
proprietary interest in, or increase their proprietary interest in, the Company.
For purposes of the Plan,  the terms  "Subsidiary"  and "Parent"  shall mean any
present or future  corporation  which would be a "subsidiary  corporation"  or a
"parent corporation" respectively, of the Company, as those terms are defined in
Section 424 of the Internal  Revenue Code of 1986,  as amended,  and as the same
may be amended from time to time (the "Code").

         Options  granted  under the Plan are  intended  to  constitute  options
granted pursuant to an "employee stock purchase plan" under Code Section 423 and
shall be referred to in the Plan as "options."

2.      ADMINISTRATION.

          (a) BY THE BOARD OF DIRECTORS.  The Plan shall be  administered by the
Board of  Directors  of the  Company  (the  "Board")  unless and until the Board
delegates  administration  to a  committee  (the  "Committee")  as  provided  in
Paragraph  2(b).  The  Board or the  Committee,  as the  case  may be,  shall be
referred to in the Plan as the "Administrator." Subject to the provisions of the
Plan, the Administrator shall have authority to construe and interpret the Plan,
to  promulgate,  amend  and  rescind  rules  and  regulations  relating  to  its
administration,  to determine the timing and manner of the grant of the options,
the number of shares covered by and all other terms of the options, to determine
the duration and purpose of leaves of absence  which may be granted to employees
without  constituting  termination  of their  employment  for the purpose of the
Plan,  and to make any and all other  determinations  which it  determines to be
necessary or advisable for the  administration of the Plan;  provided,  however,
that  notwithstanding  anything  to the  contrary  contained  in the  Plan,  all
Participants,  as  defined in  Paragraph  5(b),  shall have the same  rights and
privileges within the meaning of Code Section 423(b)(5).  The interpretation and
construction  by the  Administrator  of any  provision  of the  Plan,  or of any
agreement or option issued and executed under or pursuant to the Plan,  shall be
final and binding upon holders of options granted under the Plan and affected by
such  interpretation  or  construction.  No member of the Board or the Committee
shall be liable for any action or determination undertaken or made in good faith
with respect to the Plan or any agreement or option issued and executed pursuant
to the Plan.

          (b) BY A  COMMITTEE  OF THE  BOARD.  The  Board  may,  in its sole and
absolute  discretion,  delegate  any or all of its  duties  and  authority  with
respect to the Plan to a Committee  of not less than three  members of the Board
to be appointed by and to serve at the  pleasure of the Board.  Once  appointed,
each member of the Committee shall continue to serve until otherwise directed by
the Board.  From time to time,  the Board may  increase or decrease (to not less
than three members) the size of the Committee, add additional members to, remove
members  (with or without  cause)  from,  appoint  new  members in  substitution
therefor,  and fill vacancies,  however caused, in the Committee.  The Committee
shall  keep  minutes of all of its  meetings  and shall  provide  copies of such
minutes to the Board.  Subject to the limitations  prescribed by applicable law,
the Plan and the Board,  the  Committee  may establish and follow such rules and
regulations for the conduct of its business as it may determine to be advisable.

3.       ELIGIBILITY.

         All  employees of the Company,  any  Subsidiary  or any Parent,  except
employees  who have been  employed by the Company for less than five months,  or
who are customarily scheduled to work less than 20 hours per week or less than 5
months  during a year,  shall be eligible to receive  options  granted under the
Plan; provided,  however, that no option shall be granted to an employee if such
employee, immediately after the option is granted, would own stock



                                    Page A-1

<PAGE>



(as defined by Sections  423(b)(3) and 424(d) of the Code) possessing 5% or more
of the  total  combined  voting  power or value of all  classes  of stock of the
Company, any Subsidiary or any Parent.

4.       THE STOCK.

          The stock subject to any option  granted under or pursuant to the Plan
shall be shares of the Company's  authorized  but unissued or reacquired  common
stock,  par value $.001 per share (the  "Shares").  Subject to adjustment as set
forth in this Paragraph 4 and Paragraph 10, the aggregate number of Shares which
may be  purchased  upon  exercise  of options  granted  under the Plan shall not
exceed 600,000 Shares;  provided,  however, that if any outstanding option shall
for any  reason  expire or  terminate  unexercised,  the  Shares  subject to the
unexercised portion of the option shall again be available for options under the
Plan as though no option had been granted with respect to such Shares. Each time
any of the events set forth in Paragraph  10(a) or Paragraph  10(b) occurs,  the
number of Shares to be  purchased  under the Plan shall be  adjusted in the same
manner as shares subject to any  outstanding  option would be adjusted under the
provisions of Paragraph 10(a) and Paragraph 10(b), respectively. If on any Grant
Date or Exercise  Date (as defined in Paragraph  5(a) below) the total number of
Shares which would otherwise be subject to options granted pursuant to Paragraph
5(a) exceeds the number of Shares then available under the Plan (after deduction
of all shares for which  options have been  exercised or are then  outstanding),
the Company shall make a pro rata allocation of the Shares  remaining  available
for issuance upon exercise of options in as uniform a manner as practicable.  If
such event occurs on a Grant Date, the Company shall give written notice to each
Participant (as defined in Paragraph 5(b) below) affected  thereby and shall, if
necessary, reduce the rate of payroll deductions.

5.       GRANT OF OPTIONS.

          (a) GENERAL STATEMENT; "GRANT DATE"; "OPTION PERIOD"; "EXERCISE DATE."
Options may be granted from time to time under this Plan in accordance with this
Paragraph  5. The dates on which  options  shall be granted and the terms of the
options shall be established from time to time by the  Administrator;  provided,
however, that (i) the term of any option shall not exceed one year; and (ii) all
options  granted on any Grant  Date  shall  have the same  terms and  conditions
(except  they may differ  with  respect to the number of shares  subject to each
such option). For purposes of this Plan, each date on which an option is granted
shall be referred to as a "Grant  Date," the period  during  which any option is
outstanding shall be referred to as the "Option Period," and the last day of the
Option  Period for any option  shall be referred to as an  "Exercise  Date." The
number of Shares  subject to each option shall be the  quotient,  excluding  all
fractions, of the total paid into the Plan by each Participant during the Option
Period in accordance with Paragraphs 5(b) and (f), divided by the "Option Price"
(as defined in Paragraph 7(b) below).

          (b) ELECTION TO  PARTICIPATE:  PAYROLL  DEDUCTION  AND  AUTHORIZATION.
Except as provided in Paragraph 5(f) below, an eligible employee may participate
in the Plan only by means of payroll  deductions.  Each  eligible  employee  who
elects  to  participate  in the  Plan (a  "Participant")  shall  deliver  to the
Company,  during the calendar  month  preceding a Grant Date, a Written  Payroll
Deduction  Authorization  Form in the form authorized by the  Administrator,  in
which the Participant  gives notice of his or her election to participate in the
Plan as of the next Grant Date,  and  designates a stated  amount to be deducted
from his or her compensation on each payday and paid into an account  maintained
under the Plan for his or her benefit. The stated amount to be deducted from the
Participant's  compensation  on each payday may be no less than 1% of the amount
of "eligible  compensation"  (as defined in Paragraph 5(d) below) from which the
deduction  is made and may not exceed  either of the  following:  (i) 10% of the
amount of  "eligible  compensation"  (as defined in  Paragraph  5(d) below) from
which  the   deduction  is  made;  or  (ii)  an  amount  which  will  result  in
noncompliance  with the $25,000  limitation stated in Paragraph 5(e) below. Once
an employee becomes a Participant in the Plan, such employee will  automatically
participate in the Plan during each successive  Option Period until such time as
the  employee  withdraws  from  the  Plan  as  provided  in  Paragraph  8 or the
employee's  employment  is  terminated  as provided in  Paragraph 9. An eligible
employee is not required to file a new Written Payroll  Deduction  Authorization
Form in order  to  remain  a  Participant  in the  Plan  during  any  subsequent
successive Option Periods.

          (c) CHANGES IN PAYROLL AUTHORIZATION. Except as otherwise provided in
Paragraph 8 or 9, the amount deducted from a Participant's  compensation on each
payday must remain the same throughout any Option Period.



Page A-2

<PAGE>



          (d) "ELIGIBLE  COMPENSATION" DEFINED. The term "Eligible Compensation"
means  the  Participant's  regular  rate  of pay on the  Grant  Date.  "Eligible
Compensation"  does not include  management  incentives  and bonuses,  overtime,
extended work week premiums, or other special payments, fees or allowances.

          (e) $25,000 LIMITATION.  No option may be granted under the Plan which
would  permit  the  Participant  to credit (by means of  payroll  deductions  or
otherwise)  toward the  purchase of Shares  under the Plan,  and under any other
employee stock purchase plan pursuant to Section 423 of the Code of the Company,
any  Subsidiary  or any Parent,  an amount  which would  permit the  purchase of
Shares with an aggregate  fair market value in excess of $25,000  (determined on
the Grant Date) for any calendar year in which such option is outstanding at any
time.

          (f) ADDITIONAL  PURCHASES.  The Administrator  may, in its discretion,
from time to time  permit  purchases  of Shares  under  the Plan  other  than by
payroll deductions.

          (g) ACCOUNT.  All payroll  deductions  made by a Participant  shall be
credited to an account established for the benefit of the Participant.

6.        FAIR MARKET VALUE.

          For the purposes of the Plan,  the "Fair Market Value" of the Stock on
a given date shall be the  closing  sale price of the Stock as  reported  by the
Nasdaq  National Market (or any national stock exchange (an "exchange") on which
the Stock is at the time listed or admitted  to  trading)  for a single  trading
day.  If no sales of the Stock  were made on the Nasdaq  National  Market (or an
exchange)  on the  transaction  date,  Fair Market  Value shall mean the closing
price of a share of the Stock as reported  for the next  preceding  day on which
sales of the Stock were made on the Nasdaq National Market (or an exchange).

7.        EXERCISE OF OPTIONS; HOLDING PERIOD.

          (a) GENERAL STATEMENT. Unless a Participant withdraws from the Plan as
provided in  Paragraph  8, or the  Participant's  employment  is  terminated  as
provided in Paragraph 9, each Participant in the Plan  automatically and without
any  action  on his or her part  shall be deemed  to have  exercised  his or her
option  on each  Exercise  Date  to the  extent  that  the  balance  then in the
Participant's  account  under the Plan is  sufficient to purchase at the "Option
Price" (as  determined  in Paragraph  7(b) below)  whole  Shares  subject to the
Participant's  option. Any balance remaining in the Participant's  account after
such  purchase  shall be carried over to the next Option Period on behalf of the
Participant  unless the  Participant  elects,  in  writing,  to have the balance
refunded,  in  which  event  the  balance  shall  be  promptly  refunded  to the
Participant.  Except as otherwise  provided in Paragraph 9(b), options shall not
be exercised on any date other than an Exercise Date.

          (b) "OPTION PRICE"  DEFINED.  The Option Price per Share to be paid by
each  Participant  upon the exercise of his or her option shall be the lesser of
(i) 85% of the Fair Market Value of a Share on the Exercise  Date or (ii) 85% of
the Fair Market Value of a Share on the Grant Date.

          (c) DELIVERY OF STOCK  CERTIFICATES.  As promptly as practicable after
the  Exercise  Date,  the  Company  shall  deliver to each  Participant  a stock
certificate  issued  in  his  or  her  name,  or in a  name  designated  by  the
Participant,  for the number of shares with  respect to which the  Participant's
option was  exercised and for which the  Participant  has paid the Option Price.
Notwithstanding  anything to the  contrary  contained  in this  Paragraph  7, no
option shall be deemed  exercised and no certificate  shall be delivered  unless
and until any then  applicable  requirements  of all state and federal  laws and
regulatory  agencies shall have been fully complied with to the  satisfaction of
the  Company  and its  counsel.  If the  Company  is unable  to comply  with any
applicable  securities law requirements,  the Company shall not be liable to any
Participant except to return to the Participant the amount of the balance in the
Participant's account.

          (d) RIGHTS OF STOCKHOLDER.  No Participant  shall have any rights as a
stockholder  with  respect to any of the Shares  subject to options  held by the
Participant  until the date a stock  certificate  for such Shares is issued.  No
adjustment shall be made for dividends  (ordinary or  extraordinary,  whether in
cash, securities or other property) or


                                    Page A-3

<PAGE>



distributions  or other  rights for which the  record  date is prior to the date
such stock certificate is issued, except as provided in Paragraph 10 below.

          (e) HOLDING PERIOD. Shares issued pursuant to the Plan may not be sold
or  transferred  for a period of 90 days from the date of  purchase.  Each stock
certificate  for Shares issued  pursuant to the Plan shall contain the following
legend:

         THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ISSUED PURSUANT TO
         3D SYSTEMS CORPORATION'S 1998 EMPLOYEE STOCK PURCHASE PLAN, PURSUANT TO
         WHICH  THE  SHARES  EVIDENCED  BY THIS  CERTIFICATE  CANNOT  BE SOLD OR
         OTHERWISE TRANSFERRED,  PLEDGED OR HYPOTHECATED FOR A PERIOD OF 90 DAYS
         AFTER THE DATE OF  ISSUANCE.  A COPY OF 3D SYSTEMS  CORPORATION'S  1998
         EMPLOYEE STOCK PURCHASE PLAN MAY BE OBTAINED AT THE PRINCIPAL OFFICE OF
         3D SYSTEMS CORPORATION.

8.       WITHDRAWAL FROM THE PLAN.

          (a) GENERAL  STATEMENT.  A Participant  may withdraw in whole from the
Plan at any  time.  A  Participant  who  wishes to  withdraw  from the Plan must
deliver to the  Company a Notice of  Withdrawal  in the form  authorized  by the
Administrator.  Promptly  after the Notice of  Withdrawal  is  delivered  to the
Company,  the Company shall refund to the  Participant the amount of the balance
in the Participant's  account under the Plan and,  automatically and without any
further act on the  Participant's  part,  the  Participant's  payroll  deduction
authorization,  interest  in the Plan and  option  granted  under the Plan shall
terminate.

          (b) ELIGIBILITY AFTER WITHDRAWAL.  A Participant's withdrawal from the
Plan during an Option Period shall not affect such Participant's  eligibility to
be granted an option on any Grant Date following such Option Period.

9.       TERMINATION OF EMPLOYMENT.

          (a)  TERMINATION OF EMPLOYMENT  OTHER THAN BY PERMANENT  DISABILITY OR
DEATH.  If  a  Participant  fails  to  remain  an  eligible  employee,  or  if a
Participant  ceases to be employed by the Company,  any Subsidiary or any Parent
for any reason  other than  permanent  disability  or death,  the  Participant's
participation  in the Plan  shall  terminate.  The  Participant  shall  cease to
participate in the Plan as of the date of the  termination of the  Participant's
employment,  or as of the date the  Participant  fails to constitute an eligible
employee,  as the  case  may  be.  The  Company  shall  promptly  refund  to the
Participant  the amount of the balance in the  Participant's  account  under the
Plan as of such date, and the Participant's interest in the Plan and any options
granted under the Plan shall automatically terminate on such date.

          (b)  TERMINATION  BY DEATH OR PERMANENT  DISABILITY.  If a Participant
shall die or become permanently disabled while in the employ of the Company, any
Subsidiary or any Parent,  the Participant or the executor of the  Participant's
will or the  administrator of the  Participant's  estate, as the case may be, by
written  notice to the Company may either (i) exercise the option as of the date
of death or  permanent  disability,  in which event the Company  shall apply the
balance  in the  Participant's  account  under the Plan to the  purchase  at the
Option  Price of whole  Shares and refund the excess,  if any,  or (ii)  request
payment of the balance of the  Participant's  account  under the Plan,  in which
event the Company  shall  promptly  make such  payments,  and the  Participant's
interest in the Plan and the option granted under the Plan shall  terminate upon
such  payment.  If the Company does not receive such notice prior to the earlier
to  occur of the  Exercise  Date or 90 days  after  the  Participant's  death or
permanent disability, as the case may be, it shall be conclusively presumed that
alternative (ii) has been elected. In the event of the death of the Participant,
the  Shares  and/or  the cash to which  the  Participant  is  entitled  shall be
delivered to the individual,  if any, whom the Participant designated in writing
to be the  Participant's  beneficiary  under the Plan,  and in the  absence of a
beneficiary  validly  designated by the Participant  under the Plan, the Company
shall  deliver the Shares  and/or cash to the executor or  administrator  of the
estate,  if any,  or if none to the heirs of the  Participant.  If the option is
exercised, the date of death or permanent disability,  as the case may be, shall
be deemed the Exercise Date for the purpose of computing the Option Price.



Page A-4

<PAGE>



          (c)  "PERMANENT   DISABILITY"  DEFINED.  For  purposes  of  the  Plan,
permanent  disability shall occur if a Participant  shall have failed to perform
his or her  services  as an  employee  of the  Company  for a period of 120 days
because of ill  health,  physical  or mental  disability  or for any other cause
beyond the control of the Participant.

10.       ADJUSTMENTS UPON RECAPITALIZATION.

          Subject to any required action by the stockholders of the Company:

          (a) If the outstanding  Shares are increased or decreased  through any
stock dividend,  stock split,  reverse stock split or otherwise,  an appropriate
adjustment shall be made simultaneously  therewith in all of the following:  (i)
the maximum  number of Shares to be  purchased  under the Plan,  (ii) the Option
Price, and (iii) the number of Shares subject to any then outstanding options.

          (b) In case of any  capital  reorganization,  reclassification  of the
Shares  (other than a  recapitalization  described  in Paragraph  10(a)  above),
consolidation or merger of the Company (collectively,  a "Reorganization"),  the
holders of all outstanding  options under the Plan shall  thereafter be entitled
upon  exercise  to  purchase  the kind and  number  of  shares of stock or other
securities or property of the Company  receivable upon such  Reorganization by a
holder of the number of Shares which the option entitles such holder to purchase
from the Company prior to such Reorganization; and in any such case, appropriate
adjustment  shall be made in the applications of the provisions set forth in the
Plan with respect to the Participant's rights and interest thereafter, such that
the provisions set forth in the Plan (including the specified  changes and other
adjustments  to the Option Price) shall  thereafter be applicable in relation to
any  shares  or other  property  thereafter  purchasable  upon  exercise  of the
outstanding options.

          (c) If the Company is dissolved or liquidated,  then the Participant's
participation  in  the  Plan  shall  terminate  on  the  effective  date  of the
dissolution  or  liquidation,  and the  Company  shall  promptly  refund  to the
Participant  the amount of the balance in the  Participant's  account  under the
Plan. Upon such dissolution or liquidation,  the Participant's payroll deduction
authorization,  interest in the Plan and option  under the Plan shall  terminate
automatically and without any further act on the Participant's part.

          (d) To the extent that the  foregoing  adjustments  relate to stock or
securities of the Company,  such adjustments shall be made by the Administrator,
and its determination shall be final, binding and conclusive.

          (e) The  provisions of this Paragraph 10 are intended to be exclusive,
and no Participant  shall have any other right upon the occurrence of any of the
events described in this Paragraph 10.

     (f) The grant of  options  under  this Plan shall not affect in any way the
right  or  power  of  the  Company  to  make   adjustments,   reclassifications,
reorganizations  or changes in its capital or business  structure,  or to merge,
consolidate,  dissolve or  liquidate,  or to sell or transfer all or any part of
its business or assets.

11.      RESTRICTION UPON ASSIGNMENT.

         An option  granted under the Plan shall not be  transferable  otherwise
than by will or the laws of descent and  distribution,  and shall be exercisable
during the Participant's lifetime only by the Participant.  The Company will not
recognize  and shall be under no duty to recognize  any  assignment or purported
assignment of a Participant's option or of any rights under the option.



Page A-5

<PAGE>



12.      USE OF FUNDS; NO INTEREST PAID.

         All funds  received by the Company upon the  exercise of options  under
the Plan shall be included  in the general  funds of the Company and may be used
for any  corporate  purpose.  No interest  shall be paid to any  Participant  or
credited to any Participant's account under the Plan.

13.      AMENDMENT OF THE PLAN.

         The  Administrator may amend the Plan in such respects as it shall deem
advisable;  provided,  however,  that to the extent required for compliance with
Code Section 423 or any applicable law or regulation,  stockholder approval will
be required for any amendment  that will (a) increase the total number of Shares
as to which options may be granted  under the Plan,  (b)  materially  modify the
class of persons  eligible  to receive  options,  (c)  materially  increase  the
benefits accruing to Participants  under the Plan, (d) decrease the Option Price
below a price  computed  in the manner  stated in  Section  7, or (e)  otherwise
require stockholder approval under any applicable law or regulation.

14.      TERM OF THE PLAN.

         The term of the Plan shall  commence on the date of its adoption by the
Board  of  Directors  of the  Company  (the  "Effective  Date").  Unless  sooner
terminated by the Board in its sole discretion, the Plan shall expire five years
from the Effective Date. Such termination or expiration shall not affect options
previously granted.

15.      REPORTS.

         Upon the  exercise  of any  option  and if  required  by the Code,  the
Company shall file with the Internal  Revenue  Service a return  containing  the
information  required to be reported pursuant to Section 6039 of the Code or any
replacement  thereof.  The  Company  shall  deliver a copy of such return to the
Participant. After the end of each Option Period, each Participant shall receive
a  report  of  such  Participant's  account  setting  forth  the  total  payroll
deductions accumulated,  the number of Shares purchased,  and the remaining cash
balance, if any, carried forward to the next Option Period.

16.      RIGHTS AS AN EMPLOYEE.

         Nothing in the Plan shall be  construed to give any person the right to
remain in the employ of the  Company  or to affect  the right of the  Company to
terminate the employment of any person at any time with or without cause.

17.      INFORMATION TO EMPLOYEES.

         At least annually,  each Participant shall receive financial statements
from the  Company,  except for  employees  whose duties in  connection  with the
Company assure them access to equivalent information.

18.      TAX WITHHOLDING.

         The Company shall have the right to deduct from all payments  hereunder
any federal,  local or employment  taxes that it deems are required by law to be
withheld with respect to such payments.



                                      A-6

<PAGE>


                                                                     Exhibit 5.1


              Troop Meisinger Steuber & Pasich, llp
                             lawyers

                          July 4, 1998



3D Systems Corporation
26081 Avenue Hall
Valencia, California 91355


Ladies/Gentlemen:

          At your request,  we have examined the Registration  Statement on Form
S-8 (the  "Registration  Statement") to which this letter is attached as Exhibit
5.1 filed by 3D Systems Corporation,  a Delware corporation (the "Company"),  in
order to register  under the  Securities  Act of 1933,  as amended  (the "Act"),
600,000 shares of Common Stock (the "Shares"),  of the Company issuable pursuant
to the Company's 1998 Employee Stock Purchase Plan (the "Plan").

          We are of the opinion  that the Shares have been duly  authorized  and
upon issuance and sale in conformity  with and pursuant to the Plan,  the Shares
will be validly issued, fully paid and non-assessable.

          We  consent  to  the  use  of  this  opinion  as  an  Exhibit  to  the
Registration Statement and to the use of our name in the Prospectus constituting
a part thereof.


                             Respectfully submitted,

                             Troop Meisinger Steuber & Pasich, LLP

                             TROOP MEISINGER STEUBER & PASICH, LLP




<PAGE>



                                                                    Exhibit 23.1







                       CONSENT OF INDEPENDENT ACCOUNTANTS




To the Board of Directors of 3D Systems Corporation:

We consent to the incorporation by reference in this  registration  statement of
3D Systems Corporation on Form S-8 of our report dated February 24, 1998, on our
audits of the consolidated financial statements and financial statement schedule
of 3D Systems  Corporation  as of December 31, 1997 and 1996,  and for the years
ended  December  31,  1997,  1996,  and 1995,  which  report is  included in the
Company's Annual Report on Form 10-K for the fiscal year ended December 31, 1997
which is incorporated herein by reference.


/s/ PRICE WATERHOUSE COOPERS LLP

Los Angeles, California
July 8, 1998


<PAGE>



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