METRICOM INC / DE
S-8, 1998-08-31
RADIO & TV BROADCASTING & COMMUNICATIONS EQUIPMENT
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<PAGE>   1
     As filed with the Securities and Exchange Commission on August 28, 1998
                                                       Registration No. 333-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

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

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

                                 METRICOM, INC.
             (Exact name of registrant as specified in its charter)

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

         Delaware                                         77-0294597
(State of Incorporation)                    (I.R.S. Employer Identification No.)

                              980 UNIVERSITY AVENUE
                        LOS GATOS, CALIFORNIA 95030-2375
                    (Address of principal executive offices)



                           1997 EQUITY INCENTIVE PLAN
                     1997 NON-OFFICER EQUITY INCENTIVE PLAN
                 1993 NON-EMPLOYEE DIRECTORS' STOCK OPTION PLAN
                        1991 EMPLOYEE STOCK PURCHASE PLAN
                            (Full title of the plans)

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

                              TIMOTHY A. DREISBACH
                      PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                 METRICOM, INC.
                              980 UNIVERSITY AVENUE
                        LOS GATOS, CALIFORNIA 95030-2375
                                 (408) 399-8200
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

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


                                   Copies to:
                            KENNETH L. GUERNSEY, ESQ.
                               COOLEY GODWARD LLP
                         ONE MARITIME PLAZA, 20TH FLOOR
                             SAN FRANCISCO, CA 94111
                                 (415) 693-2000


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



                                                              Page 1 of 44 Pages
                                                         Exhibit Index at Page 6


<PAGE>   2


<TABLE>
<CAPTION>
                                                  CALCULATION OF REGISTRATION FEE
===============================================================================================================================
                                                      PROPOSED MAXIMUM          PROPOSED MAXIMUM
 TITLE OF SECURITIES TO BE                           OFFERING PRICE PER     AGGREGATE OFFERING PRICE
        REGISTERED              AMOUNT TO BE             SHARE (1)                     (1)              AMOUNT OF REGISTRATION
                                 REGISTERED                                                                      FEE
============================ ==================== ========================= ========================== =========================
<S>                          <C>                  <C>                       <C>                        <C>    
Shares of Common Stock,                  400,000                   $5.3125              $2,125,000.00                   $626.88
par value $.001 per share,
reserved for future grant
under the 1997 Equity
Incentive Plan


Shares of Common Stock,                  675,000                   $5.3125              $3,585,937.50                 $1,057.85
par value $.001 per share,
reserved for future grant
under the 1997 Non-Officer
Equity Incentive Plan

Shares of Common Stock,                   75,000                   $5.3125                $398,437.50                   $117.54
par value $.001 per share,
reserved for future grant
under the 1993
Non-Employee Directors
Stock Option Plan

Shares of Common Stock,                  200,000                   $5.3125              $1,062,500.00                   $313.44
par value $.001 per share,
reserved for future
issuance under the 1991
Employee Stock Purchase
Plan

Totals

                                       1,350,000                   $5.3125              $7,171,875.00                 $2,115.71

</TABLE>


(1)      Estimated solely for the purpose of calculating the amount of the
         registration fee pursuant to Rule 457(c). The price per share and
         aggregate offering price are based upon the closing sales price of
         Registrant's Common Stock on August 27, 1998 as reported on the NASDAQ
         National Market System.


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

                                       2

<PAGE>   3

                    INCORPORATION BY REFERENCE OF CONTENTS OF
                       REGISTRATION STATEMENTS ON FORM S-8
                  NOS. 33-47688, 33-63088, 33-81746, 33-95070,
                             333-32211 AND 333-09001


         The contents of Registration Statements on Form S-8 Nos. 33-47688,
33-63088, 33-81746, 33-95070, 333-32211 and 333-09001 filed with the Securities
and Exchange Commission on May 5, 1992, May 21, 1993, July 20, 1994, July 27,
1995, July 26, 1996 and July 28, 1987, respectively, are incorporated by
reference herein with such modifications as are set forth below.

          Amendments to the 1997 Equity Incentive Plan (the "Incentive Plan"),
1993 Non-Employee Directors' Stock Option Plan (the "Directors' Plan") and 1991
Employee Stock Purchase Plan (the "Purchase Plan") by the Board in April 1998,
approved by the stockholders in June 1998, increased the number of shares of the
Company's Common Stock authorized for issuance under the Incentive Plan from
675,000 shares to 1,075,000 shares, increased the number of shares of the
Company's Common Stock authorized for issuance under the Directors' Plan from
300,000 shares to 375,000 shares and increased the number of shares of the
Company's Common Stock available for issuance under the Purchase Plan from
350,000 shares to 550,000 shares. An amendment to the Company's 1997 Non-Officer
Equity Incentive Plan (the "Non-Officer Plan") by the Board in April 1998
increased the number of shares of the Company's Common Stock available for
issuance under the Non-Officer Plan from 675,000 shares to 1,350,000 shares.
Stockholder approval of the amendment of the Company's 1997 Non-Officer Equity
Incentive Plan was not required.

                                    EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT
NUMBER

<S>     <C>
5.1     Opinion of Cooley Godward LLP.

23.1    Consent of Arthur Andersen LLP.

23.2    Consent of Cooley Godward LLP is contained in Exhibit 5 to this
        Registration Statement.

24      Power of Attorney is contained on the signature pages.

99.1    1997 Equity Incentive Plan, as amended through April 29, 1998.

99.2    1997 Non-Officer Equity Incentive Plan, as amended through April 29,
        1998.

99.3    1993 Non-Employee Directors' Stock Option Plan, as amended through April
        29, 1998.

99.4    1991 Employee Stock Purchase Plan, as amended through April 29, 1998.

</TABLE>


                                       3
<PAGE>   4

                                   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 Los Gatos, State of California, on August 27,
1998.


                                   METRICOM, INC.




                                   By:      /s/ Vanessa A. Wittman
                                            ------------------------------------
                                            Vanessa A. Wittman
                                            Title: Chief Financial Officer



                                POWER OF ATTORNEY


         KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Timothy A. Dreisbach and Vanessa A.
Wittman, and each or any one of them, his or her true and lawful
attorney-in-fact and agent, with full power of substitution and resubstitution,
for him or her and in his or her name, place and stead, in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this Registration Statement, 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 connection therewith, as fully to all
intents and purposes as he or she might or could do in person, hereby ratifying
and confirming all that said attorneys-in-fact and agents, or any of them, or
their or his or her substitutes or substitute, may lawfully do or cause to be
done by virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>
<CAPTION>
SIGNATURE                                             TITLE                                       DATE
<S>                                                   <C>                                      <C>


         /s/ Robert P. Dilworth                       Chairman of the Board                       August 27, 1998
- --------------------------------------------
         (Robert P. Dilworth)




         /s/ Timothy A. Dreisbach                     President, Chief Executive Officer          August 27, 1998
- --------------------------------------------          and Director (Principal Executive
         (Timothy A. Dreisbach)                       Officer)
                                                      

</TABLE>


                                       4
<PAGE>   5


<TABLE>
<S>                                                   <C>                                      <C>
         /s/ Vanessa A. Wittman                       Chief Financial Officer (Principal          August 27, 1998
- --------------------------------------------          Financial and Accounting Officer) 
         (Vanessa A. Wittman)                         




         /s/ Robert S. Cline                          Director                                    August 27, 1998
- --------------------------------------------
         (Robert S. Cline)




         /s/ Ralph Derrickson                         Director                                    August 7, 1998
- --------------------------------------------
         (Ralph Derrickson)




         /s/ Justin L. Jaschke                        Director                                    August 7, 1998
- --------------------------------------------
         (Justin L. Jaschke)




         /s/ David Liddle                             Director                                    August 27, 1998
- --------------------------------------------
         (David Liddle)




         /s/ William D. Savoy                         Director                                    August 27, 1998
- --------------------------------------------
         (William D. Savoy)

</TABLE>


                                       5
<PAGE>   6


                                  EXHIBIT INDEX


<TABLE>
<CAPTION>
EXHIBIT
NUMBER                                          DESCRIPTION                                    SEQUENTIAL PAGE
                                                                                                NUMBER
<S>         <C>                                                                                <C>
5.1         Opinion of Cooley Godward LLP.                                                              7

23.1        Consent of Arthur Andersen LLP.                                                             8

23.2        Consent of Cooley Godward LLP is contained in Exhibit 5 to this                            --
            Registration Statement.

24          Power of Attorney is contained on the signature pages.                                     --

99.1        1997 Equity Incentive Plan as amended through April 29,1998.                                9

99.2        1997 Non-Officer Equity Incentive Plan as amended through April 29,1998.                   22

99.3        1993 Non-Employee Directors' Stock Option Plan as amended through April                    32
            29, 1998.

99.4        1991 Employee Stock Purchase Plan as amended through April 29, 1998.                       38

</TABLE>



                                       6

<PAGE>   1


                                                                             5.1


August 28, 1998



Metricom, Inc.
980 University Avenue
Los Gatos, CA 95030-2375


Ladies and Gentlemen:

You have requested our opinion with respect to certain matters in connection
with the filing by Metricom, Inc. (the "Company") of a Registration Statement on
Form S-8 (the "Registration Statement") with the Securities and Exchange
Commission covering the offering of up to an aggregate of 1,350,000 shares of
the Company's Common Stock, $.001 par value, (the "Shares") pursuant to its 1997
Equity Incentive Plan (the "Incentive Plan"), 1997 Non-Officer Equity Incentive
Plan (the "Non-Officer Plan"), 1993 Non-Employee Directors' Stock Option Plan
(the "Directors' Plan") and 1991 Employee Stock Purchase Plan (the "Purchase
Plan") (the Incentive Plan, Non-Officer Plan, Directors' Plan and Purchase Plan
being hereinafter collectively referred to as the "Plans").

In connection with this opinion, we have examined the Registration Statement and
related Prospectus, your Certificate of Incorporation and By-laws, as amended,
and such other documents, records, certificates, memoranda and other instruments
as we deem necessary as a basis for this opinion. We have assumed the
genuineness and authenticity of all documents submitted to us as originals, the
conformity to originals of all documents submitted to us as copies thereof, and
the due execution and delivery of all documents where due execution and delivery
are a prerequisite to the effectiveness thereof.

On the basis of the foregoing, and in reliance thereon, we are of the opinion
that the Shares, when sold and issued in accordance with the Plans, the
Registration Statement and related Prospectuses, will be validly issued, fully
paid, and nonassessable (except as to shares issued pursuant to certain deferred
payment arrangements, which will be fully paid and nonassessable when such
deferred payments are made in full).

We consent to the filing of this opinion as an exhibit to the Registration
Statement.

Very truly yours,

Cooley Godward LLP



By:      /s/ Kenneth L. Guernsey
         --------------------------------
         Kenneth L. Guernsey



                                       7

<PAGE>   1


                                                                            23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

         As independent public accountants, we hereby consent to the
incorporation by reference in this Registration Statement on Form S-8 of our
report dated February 9, 1998 included in Metricom, Inc.'s Form 10-K for the
year ended December 31, 1997 and to all references to our Firm included in this
registration statement.


 /s/ Arthur Andersen LLP
- --------------------------------
San Jose, California
August 27, 1998



                                       8

<PAGE>   1


                                                                            99.1

                                 METRICOM, INC.

                           1997 EQUITY INCENTIVE PLAN

                             ADOPTED MARCH 14, 1997
                      APPROVED BY STOCKHOLDERS MAY 1, 1997
               AMENDED BY THE BOARD OF DIRECTORS ON APRIL 29, 1998
                    APPROVED BY STOCKHOLDERS ON JUNE 26, 1998

                                  INTRODUCTION

1.       PURPOSES.

         (a) The purpose of the Plan is to provide a means by which selected
Employees and Directors of and Consultants to the Company and its Affiliates may
be given an opportunity to benefit from increases in value of the common stock
of the Company ("Common Stock") through the granting of (i) Incentive Stock
Options, (ii) Nonstatutory Stock Options, (iii) stock bonuses and (iv) rights to
purchase restricted stock, all as defined below.

         (b) The Company, by means of the Plan, seeks to retain the services of
persons who are now Employees, Directors or Consultants, to secure and retain
the services of new Employees, Directors and Consultants, and to provide
incentives for such persons to exert maximum efforts for the success of the
Company and its Affiliates.

         (c) The Company intends that the Stock Awards issued under the Plan
shall, in the discretion of the Board or any Committee to which responsibility
for administration of the Plan has been delegated pursuant to subsection 3(C),
be either (i) Options granted pursuant to Section 6 hereof, including Incentive
Stock Options and Nonstatutory Stock Options, or (ii) stock bonuses or rights to
purchase restricted stock granted pursuant to Section 7 hereof. All Options
shall be separately designated Incentive Stock Options or Nonstatutory Stock
Options at the time of grant, and a separate certificate or certificates will be
issued for shares purchased on exercise of each type of Option.

2.       DEFINITIONS.

         (a) "AFFILIATE" means any parent corporation or subsidiary corporation,
whether now or hereafter existing, as those terms are defined in Sections 424(e)
and (f) respectively, of the Code.

         (b) "BOARD" means the Board of Directors of the Company.

         (c) "CODE" means the Internal Revenue Code of 1986, as amended.

         (d) "COMMITTEE" means a Committee appointed by the Board in accordance
with subsection 3(c) of the Plan.



                                       9
<PAGE>   2

         (e) "COMPANY" means Metricom, Inc., a Delaware corporation.

         (f) "CONSULTANT" means any person, including an advisor, engaged by the
Company or an Affiliate to render consulting services and who is compensated for
such services, provided that the term "Consultant" shall not include Directors
who are paid only a director's fee by the Company or who are not compensated by
the Company for their services as Directors.

         (g) "CONTINUOUS STATUS AS AN EMPLOYEE, DIRECTOR OR CONSULTANT" means
the employment or relationship as a Director or Consultant is not interrupted or
terminated. The Board, in its sole discretion, may determine whether Continuous
Status as an Employee, Director or Consultant shall be considered interrupted in
the case of: (i) any leave of absence approved by the Board, including sick
leave, military leave, or any other personal leave; or (ii) transfers between
locations of the Company or between the Company, Affiliates or their successors.

         (h) "DIRECTOR" means a member of the Board.

         (i) "EMPLOYEE" means any person, including Officers and Directors,
employed by the Company or any Affiliate of the Company. Neither service as a
Director nor payment of a director's fee by the Company shall be sufficient to
constitute "employment" by the Company.

         (j) "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

         (k) "FAIR MARKET VALUE" means, as of any date, the value of the Common
Stock of the Company determined as follows:

                  (1) If the Common Stock is listed on any established stock
exchange, or traded on the Nasdaq National Market or The Nasdaq SmallCap Market,
the Fair Market Value of a share of Common Stock shall be the closing sales
price for such stock (or the closing bid, if no sales were reported) as quoted
on such exchange or market (or the exchange or market with the greatest volume
of trading in Common Stock) on the last market trading day prior to
determination, as reported in the Wall Street Journal or such other source as
the Board deems reliable;

                  (2) In the absence of such markets for the Common Stock, the
Fair Market Value shall be determined in good faith by the Board.

         (l) "INCENTIVE STOCK OPTION" means an Option intended to qualify as an
incentive stock option within the meaning of Section 422 of the Code and the
regulations promulgated thereunder.

         (m) "NON-EMPLOYEE DIRECTOR" means a Director who either (i) is not a
current Employee or Officer of the Company or its parent or subsidiary, does not
receive compensation (directly or indirectly) from the Company or its parent or
subsidiary for services rendered as a consultant or in any capacity other than
as a Director (except for an amount as to which disclosure would not be required
under Item 404(a) of Regulation S-K promulgated pursuant to the Securities Act
of 1933 ("Regulation S-K"), does not possess an interest in any other
transaction as to which disclosure would be required under Item 404(a) of
Regulation S-K, and is not engaged in a business relationship as to which
disclosure would be 


                                       10
<PAGE>   3


required under Item 404(b) of Regulation S-K; or (ii) is otherwise considered a
"non-employee director" for purposes of Rule 16b-3.

         (n) "NONSTATUTORY STOCK OPTION" means an Option not intended to qualify
as an Incentive Stock Option.

         (o) "OFFICER" means a person who is an officer of the Company within
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

         (p) "OPTION" means a stock option granted pursuant to the Plan.

         (q) "OPTION AGREEMENT" means a written agreement between the Company
and an Optionee evidencing the terms and conditions of an individual Option
grant. Each Option Agreement shall be subject to the terms and conditions of the
Plan.

         (r) "OPTIONEE" means a person to whom an Option is granted pursuant to
the Plan.

         (s) "OUTSIDE DIRECTOR" means a Director who either (i) is not a current
employee of the Company or an "affiliated corporation" (within the meaning of
Treasury regulations promulgated under Section 162(m) of the Code), is not a
former employee of the Company or an "affiliated corporation" receiving
compensation for prior services (other than benefits under a tax qualified
pension plan), was not an officer of the Company or an "affiliated corporation"
at any time, and is not currently receiving direct or indirect remuneration from
the Company or an "affiliated corporation" for services in any capacity other
than as a Director, or (ii) is otherwise considered an "outside director" for
purposes of Section 162(m) of the Code.

         (t) "PLAN" means this 1997 Equity Incentive Plan.

         (u) "RULE 16B-3" means Rule 16b-3 of the Exchange Act or any successor
to Rule 16b-3, as in effect when discretion is being exercised with respect to
the Plan.

         (v) "STOCK AWARD" means any right granted under the Plan, including any
Option, any stock bonus, and any right to purchase restricted stock.

         (w) "STOCK AWARD AGREEMENT" means a written agreement between the
Company and a holder of a Stock Award evidencing the terms and conditions of an
individual Stock Award grant. Each Stock Award Agreement shall be subject to the
terms and conditions of the Plan.

3.       ADMINISTRATION.

         (a) The Plan shall be administered by the Board unless and until the
Board delegates administration to a Committee, as provided in subsection 3(c).

         (b) The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan:



                                       11
<PAGE>   4

                  (1) To determine from time to time which of the persons
eligible under the Plan shall be granted Stock Awards; when and how each Stock
Award shall be granted; whether a Stock Award will be an Incentive Stock Option,
a Nonstatutory Stock Option, a stock bonus, a right to purchase restricted
stock, or a combination of the foregoing; the provisions of each Stock Award
granted (which need not be identical), including the time or times when a person
shall be permitted to receive stock pursuant to a Stock Award; and the number of
shares with respect to which a Stock Award shall be granted to each such person.

                  (2) To construe and interpret the Plan and Stock Awards
granted under it, and to establish, amend and revoke rules and regulations for
its administration. The Board, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan or in any Stock Award Agreement,
in a manner and to the extent it shall deem necessary or expedient to make the
Plan fully effective.

                  (3) To amend the Plan or a Stock Award as provided in Section
13.

                  (4) Generally, to exercise such powers and to perform such
acts as the Board deems necessary or expedient to promote the best interests of
the Company which are not in conflict with the provisions of the Plan.

         (c) The Board may delegate administration of the Plan to a committee or
committees ("Committee") of one (1) or more members of the Board. In the
discretion of the Board, a Committee may consist solely of two (2) or more
Outside Directors, in accordance with Code Section 162(m), or solely of two (2)
or more Non-Employee Directors, in accordance with Rule 16b-3. If administration
is delegated to a Committee, the Committee shall have, in connection with the
administration of the Plan, the powers theretofore possessed by the Board,
including the power to delegate to a subcommittee any of the administrative
powers the Committee is authorized to exercise (and references in this Plan to
the Board shall thereafter be to the Committee or such a subcommittee), subject,
however, to such resolutions, not inconsistent with the provisions of the Plan,
as may be adopted from time to time by the Board. The Board may abolish the
Committee at any time and revest in the Board the administration of the Plan.

4.       SHARES SUBJECT TO THE PLAN.

         (a) Subject to the provisions of Section 12 relating to adjustments
upon changes in stock, the stock that may be issued pursuant to Stock Awards
shall not exceed in the aggregate one million seventy-five thousand (1,075,000)
shares of Common Stock. If any Stock Award shall for any reason expire or
otherwise terminate, in whole or in part, without having been exercised in full
(or vested in the case of Restricted Stock), the stock not acquired under such
Stock Award shall revert to and again become available for issuance under the
Plan.

         (b) The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.

5.       ELIGIBILITY.



                                       12
<PAGE>   5

         (a) Incentive Stock Options may be granted only to Employees. Stock
Awards other than Incentive Stock Options may be granted only to Employees,
Directors or Consultants.

         (b) No person shall be eligible for the grant of an Incentive Stock
Option if, at the time of grant, such person owns (or is deemed to own pursuant
to Section 424(d) of the Code) stock possessing more than ten percent (10%) of
the total combined voting power of all classes of stock of the Company or of any
of its Affiliates unless the exercise price of such Option is at least one
hundred ten percent (110%) of the Fair Market Value of such stock at the date of
grant and the Option is not exercisable after the expiration of five (5) years
from the date of grant.

         (c) Subject to the provisions of Section 12 relating to adjustments
upon changes in stock, no person shall be eligible to be granted Stock Awards
covering more than four hundred thousand (400,000) shares of Common Stock in any
calendar year.

6.       OPTION PROVISIONS.

         Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The provisions of separate
Options need not be identical, but each Option shall include (through
incorporation of provisions hereof by reference in the Option or otherwise) the
substance of each of the following provisions:

         (a) TERM. No Option shall be exercisable after the expiration of ten
(10) years from the date it was granted.

         (b) PRICE. The exercise price of each Incentive Stock Option shall be
not less than one hundred percent (100%) of the Fair Market Value of the stock
subject to the Option on the date the Option is granted, and the exercise price
of each Nonstatutory Stock Option shall be not less than eighty-five percent
(85%) of the Fair Market Value of the stock subject to the Option on the date
the Option is granted. Notwithstanding the foregoing, an Option may be granted
with an exercise price lower than that set forth in the preceding sentence if
such Option is granted pursuant to an assumption or substitution for another
option in a manner satisfying the provisions of Section 424(a) of the Code.

         (c) CONSIDERATION. The purchase price of stock acquired pursuant to an
Option shall be paid, to the extent permitted by applicable statutes and
regulations, either (I) in cash at the time the Option is exercised, or (ii) at
the discretion of the Board or Committee, at the time of the grant of the
Option, (A) by delivery to the Company of other Common Stock of the Company, (B)
according to a deferred payment or other arrangement (which may include, without
limiting the generality of the foregoing, the use of other Common Stock of the
Company) with the person to whom the Option is granted or to whom the Option is
transferred pursuant to subsection 6(d), or (C) in any other form of legal
consideration that may be acceptable to the Board. In the case of any deferred
payment arrangement, interest shall be payable at least annually and shall be
charged at the minimum rate of interest necessary to avoid the treatment as
interest, under any applicable provisions of the Code, of any amounts other than
amounts stated to be interest under the deferred payment arrangement.

         (d) TRANSFERABILITY. An Incentive Stock Option shall not be
transferable except by will or by the laws of descent and distribution, and
shall be exercisable during the lifetime of the person to 


                                       13
<PAGE>   6

whom the Incentive Stock Option is granted only by such person. A Nonstatutory
Stock Option may be transferred to the extent provided in the Option Agreement;
provided that if the Option Agreement does not expressly permit the transfer of
a Nonstatutory Stock Option, the Nonstatutory Stock Option shall not be
transferable except by will, by the laws of descent and distribution or pursuant
to a domestic relations order satisfying the requirements of Rule 16b-3, and
shall be exercisable during the lifetime of the person to whom the Option is
granted only by such person or any transferee pursuant to a domestic relations
order. Notwithstanding the foregoing, the person to whom the Option is granted
may, by delivering written notice to the Company, in a form satisfactory to the
Company, designate a third party who, in the event of the death of the Optionee,
shall thereafter be entitled to exercise the Option.

         (e) VESTING. The total number of shares of stock subject to an Option
may, but need not, be allotted in periodic installments (which may, but need
not, be equal). The Option Agreement may provide that from time to time during
each of such installment periods, the Option may become exercisable ("vest")
with respect to some or all of the shares allotted to that period, and may be
exercised with respect to some or all of the shares allotted to such period
and/or any prior period as to which the Option became vested but was not fully
exercised. The Option may be subject to such other terms and conditions on the
time or times when it may be exercised (which may be based on performance or
other criteria) as the Board may deem appropriate. The provisions of this
subsection 6(e) are subject to any Option provisions governing the minimum
number of shares as to which an Option may be exercised.

         (f) TERMINATION OF EMPLOYMENT OR RELATIONSHIP AS A DIRECTOR OR
CONSULTANT. In the event an Optionee's Continuous Status as an Employee,
Director or Consultant terminates (other than upon the Optionee's death or
disability), the Optionee may exercise his or her Option within such period of
time designated by the Board, which shall in no event be later than the
expiration of the term of the Option as set forth in the Option Agreement (the
"Post-Termination Exercise Period") and only to the extent that the Optionee was
entitled to exercise the Option on the date Optionee's Continuous Status as an
Employee, Director or Consultant terminates. In the case of an Incentive Stock
Option, the Board shall determine the Post-Termination Exercise Period at the
time the Option is granted, and the term of such Post-Termination Exercise
Period shall in no event exceed three (3) months from the date of termination,
and may, in the event Optionee's Continuous Status as an Employee, Director or
Consultant terminates for Cause (as defined in subsection 12(b)), terminate of
the date of such Optionee's termination. In addition, the Board may at any time,
with the consent of the Optionee, extend the Post-Termination Exercise Period
and provide for continued vesting; provided however, that any extension of such
period by the Board in excess of three (3) months from the date of termination
shall cause an Incentive Stock Option so extended to become a Nonstatutory Stock
Option, effective as of the date of Board action. If, at the date of
termination, the Optionee is not entitled to exercise his or her entire Option,
the shares covered by the unexercisable portion of the Option shall revert to
the Plan. If, after termination, the Optionee does not exercise his or her
Option within the time specified in the Option Agreement or as otherwise
determined above, the Option shall terminate, and the shares covered by such
Option shall revert to the Plan. Notwithstanding the foregoing, the Board shall
have the power to permit an Option to continue to vest during the
Post-Termination Exercise Period.

         An Optionee's Option Agreement may also provide that if the exercise of
the Option following the termination of the Optionee's Continuous Status as an
Employee, Director, or Consultant (other than 


                                       14
<PAGE>   7

upon the Optionee's death or disability) would result in liability under Section
16(b) of the Exchange Act, then the Option shall terminate on the earlier of (i)
the expiration of the term of the Option set forth in the Option Agreement, or
(ii) the tenth (10th) day after the last date on which such exercise would
result in such liability under Section 16(b) of the Exchange Act. Finally, an
Optionee's Option Agreement may also provide that if the exercise of the Option
following the termination of the Optionee's Continuous Status as an Employee,
Director or Consultant (other than upon the Optionee's death or disability)
would be prohibited at any time solely because the issuance of shares would
violate the registration requirements under the Securities Act, then the Option
shall terminate on the earlier of (i) the expiration of the term of the Option
set forth in the first paragraph of this subsection 6(f), or (ii) the expiration
of a period of three (3) months after the termination of the Optionee's
Continuous Status as an Employee, Director or Consultant during which the
exercise of the Option would not be in violation of such registration
requirements.

         (g) DISABILITY OF OPTIONEE. In the event an Optionee's Continuous
Status as an Employee, Director or Consultant terminates as a result of the
Optionee's disability, the Optionee may exercise his or her Option (to the
extent that the Optionee was entitled to exercise it at the date of
termination), but only within such period of time ending on the earlier of (i)
the date twelve (12) months following such termination (or such longer or
shorter period specified in the Option Agreement), or (ii) the expiration of the
term of the Option as set forth in the Option Agreement. If, at the date of
termination, the Optionee is not entitled to exercise his or her entire Option,
the shares covered by the unexercisable portion of the Option shall revert to
and again become available for issuance under the Plan. If, after termination,
the Optionee does not exercise his or her Option within the time specified
herein, the Option shall terminate, and the shares covered by such Option shall
revert to and again become available for issuance under the Plan.

         (h) DEATH OF OPTIONEE. In the event of the death of an Optionee during,
or within a three (3)-month period after the termination of, the Optionee's
Continuous Status as an Employee, Director or Consultant, the Option may be
exercised to the extent vested by the Optionee's estate, by a person who
acquired the right to exercise the Option by bequest or inheritance or by a
person designated to exercise the option upon the Optionee's death pursuant to
subsection 6(d), but only within the period ending on the earlier of (i) the
date eighteen (18) months following the date of death (or such longer or shorter
period specified in the Option Agreement), or (ii) the expiration of the term of
such Option as set forth in the Option Agreement. If, at the time of death, the
Optionee was not entitled to exercise his or her entire Option, the shares
covered by the unexercisable portion of the Option shall revert to and again
become available for issuance under the Plan. If, after death, the Option is not
exercised within the time specified herein, the Option shall terminate, and the
shares covered by such Option shall revert to and again become available for
issuance under the Plan.

         (i) EARLY EXERCISE. The Option may, but need not, include a provision
whereby the Optionee may elect at any time while an Employee, Director or
Consultant to exercise the Option as to any part or all of the shares subject to
the Option prior to the full vesting of the Option. Any unvested shares so
purchased may be subject to a repurchase right in favor of the Company or to any
other restriction the Board determines to be appropriate.



                                       15
<PAGE>   8

         (j) RE-LOAD OPTIONS. Without in any way limiting the authority of the
Board or Committee to make or not to make grants of Options hereunder, the Board
or Committee shall have the authority (but not an obligation) to include as part
of any Option Agreement a provision entitling the Optionee to a further Option
(a "Re-Load Option") in the event the Optionee exercises the Option evidenced by
the Option Agreement, in whole or in part, by surrendering other shares of
Common Stock in accordance with this Plan and the terms and conditions of the
Option Agreement. Any such Re-Load Option (i) shall be for a number of shares
equal to the number of shares surrendered as part or all of the exercise price
of such Option; (ii) shall have an expiration date which is the same as the
expiration date of the Option the exercise of which gave rise to such Re-Load
Option; and (iii) shall have an exercise price which is equal to one hundred
percent (100%) of the Fair Market Value of the Common Stock subject to the
Re-Load Option on the date of exercise of the original Option. Notwithstanding
the foregoing, a Re-Load Option which is an Incentive Stock Option and which is
granted to a 10% stockholder (as described in subsection 5(b)), shall have an
exercise price which is equal to one hundred ten percent (110%) of the Fair
Market Value of the stock subject to the Re-Load Option on the date of exercise
of the original Option and shall have a term which is no longer than five (5)
years.

         Any such Re-Load Option may be an Incentive Stock Option or a
Nonstatutory Stock Option, as the Board or Committee may designate at the time
of the grant of the original Option; provided, however, that the designation of
any Re-Load Option as an Incentive Stock Option shall be subject to the one
hundred thousand dollars ($100,000) annual limitation on exercisability of
Incentive Stock Options described in subsection 11(d) of the Plan and in Section
422(d) of the Code. There shall be no Re-Load Options on a Re-Load Option. Any
such Re-Load Option shall be subject to the availability of sufficient shares
under subsection 4(a) and shall be subject to such other terms and conditions as
the Board or Committee may determine which are not inconsistent with the express
provisions of the Plan regarding the terms of Options.

7.       TERMS OF STOCK BONUSES AND PURCHASES OF RESTRICTED STOCK.

         Each stock bonus or restricted stock purchase agreement shall be in
such form and shall contain such terms and conditions as the Board or Committee
shall deem appropriate. The terms and conditions of stock bonus or restricted
stock purchase agreements may change from time to time, and the terms and
conditions of separate agreements need not be identical, but each stock bonus or
restricted stock purchase agreement shall include (through incorporation of
provisions hereof by reference in the agreement or otherwise) the substance of
each of the following provisions as appropriate:

         (a) PURCHASE PRICE. The purchase price under each restricted stock
purchase agreement shall be such amount as the Board or Committee shall
determine and designate in such agreement but in no event shall the purchase
price be less than eighty-five percent (85%) of the stock's Fair Market Value on
the date such award is made. Notwithstanding the foregoing, the Board or
Committee may determine that eligible participants in the Plan may be awarded
stock pursuant to a stock bonus agreement in consideration for past services
actually rendered to the Company for its benefit.

         (b) TRANSFERABILITY. No rights under a stock bonus or restricted stock
purchase agreement shall be transferable except by will or the laws of descent
and distribution or, if the agreement so provides, pursuant to a domestic
relations order satisfying the requirements of Rule 16b-3, so long as stock
awarded under such agreement remains subject to the terms of the agreement.



                                       16
<PAGE>   9

         (c) CONSIDERATION. The purchase price of stock acquired pursuant to a
stock purchase agreement shall be paid either: (i) in cash at the time of
purchase; (ii) at the discretion of the Board or Committee, according to a
deferred payment or other arrangement with the person to whom the stock is sold;
or (iii) in any other form of legal consideration that may be acceptable to the
Board or Committee in its discretion. Notwithstanding the foregoing, the Board
or Committee to which administration of the Plan has been delegated may award
stock pursuant to a stock bonus agreement in consideration for past services
actually rendered to the Company or for its benefit.

         (d) VESTING. Shares of stock sold or awarded under the Plan may, but
need not, be subject to a repurchase option in favor of the Company in
accordance with a vesting schedule to be determined by the Board or Committee.

         (e) TERMINATION OF CONTINUOUS STATUS AS AN EMPLOYEE, DIRECTOR OR
CONSULTANT. In the event a Participant's Continuous Status as an Employee,
Director or Consultant terminates, the Company may repurchase or otherwise
reacquire any or all of the shares of stock held by that person which have not
vested as of the date of termination under the terms of the stock bonus or
restricted stock purchase agreement between the Company and such person.

8.       CANCELLATION AND RE-GRANT OF OPTIONS.

         (a) The Board or Committee shall have the authority to effect, at any
time and from time to time, (i) the repricing of any outstanding Options under
the Plan and/or (ii) with the consent of any adversely affected holders of
Options, the cancellation of any outstanding Options under the Plan and the
grant in substitution therefor of new Options under the Plan covering the same
or different numbers of shares of stock, but having an exercise price per share
not less than: eighty-five percent (85%) of the Fair Market Value for a
Nonstatutory Stock Option, one hundred percent (100%) of the Fair Market Value
in the case of an Incentive Stock Option or, in the case of an Incentive Stock
Option held by a 10% stockholder (as described in subsection 5(b)), not less
than one hundred ten percent (110%) of the Fair Market Value per share of stock
on the new grant date. Notwithstanding the foregoing, the Board or Committee may
grant an Option with an exercise price lower than that set forth above if such
Option is granted as part of a transaction to which section 424(a) of the Code
applies.

         (b) Shares subject to an Option canceled under this Section 8 shall
continue to be counted against the maximum award of Options permitted to be
granted pursuant to the Plan. The repricing of an Option hereunder resulting in
a reduction of the exercise price, shall be deemed to be a cancellation of the
original Option and the grant of a substitute Option; in the event of such
repricing, both the original and the substituted Options shall be counted
against the maximum awards of Options permitted to be granted pursuant to the
Plan, to the extent required by Section 162(m) of the Code.

9.       COVENANTS OF THE COMPANY.

         (a) During the terms of the Stock Awards, the Company shall keep
available at all times the number of shares of stock required to satisfy such
Stock Awards.

         (b) The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares under Stock Awards; 


                                       17
<PAGE>   10

provided, however, that this undertaking shall not require the Company to
register under the Securities Act of 1933, as amended (the "Securities Act")
either the Plan, any Stock Award or any stock issued or issuable pursuant to any
such Stock Award. If, after reasonable efforts, the Company is unable to obtain
from any such regulatory commission or agency the authority which counsel for
the Company deems necessary for the lawful issuance and sale of stock under the
Plan, the Company shall be relieved from any liability for failure to issue and
sell stock upon exercise of such Stock Awards unless and until such authority is
obtained.

10.      USE OF PROCEEDS FROM STOCK.

         Proceeds from the sale of stock pursuant to Stock Awards shall
constitute general funds of the Company.

11.      MISCELLANEOUS.

         (a) The Board shall have the power to accelerate the time at which a
Stock Award may first be exercised or the time during which a Stock Award or any
part thereof will vest, notwithstanding the provisions in the Stock Award
stating the time at which it may first be exercised or the time during which it
will vest.

         (b) Neither an Employee, Director nor a Consultant nor any person to
whom a Stock Award is transferred in accordance with the Plan shall be deemed to
be the holder of, or to have any of the rights of a holder with respect to, any
shares subject to such Stock Award unless and until such person has satisfied
all requirements for exercise of the Stock Award pursuant to its terms.

         (c) Nothing in the Plan or any instrument executed or Stock Award
granted pursuant thereto shall confer upon any Employee, Consultant or other
holder of Stock Awards any right to continue in the employ of the Company or any
Affiliate, or to continue serving as a Consultant and Director, or shall affect
the right of the Company or any Affiliate to terminate the employment of any
Employee with or without notice and with or without cause, or the right to
terminate the relationship of any Consultant pursuant to the terms of such
Consultant's agreement with the Company or Affiliate or service as a Director
pursuant to the Company's By-Laws.

         (d) To the extent that the aggregate Fair Market Value (determined at
the time of grant) of stock with respect to which Incentive Stock Options are
exercisable for the first time by any Optionee during any calendar year under
all plans of the Company and its Affiliates exceeds one hundred thousand dollars
($100,000), the Options or portions thereof which exceed such limit (according
to the order in which they were granted) shall be treated as Nonstatutory Stock
Options.

         (e) The Company may require any person to whom a Stock Award is
granted, or any person to whom a Stock Award is transferred in accordance with
the Plan, as a condition of exercising or acquiring stock under any Stock Award,
(1) to give written assurances satisfactory to the Company as to such person's
knowledge and experience in financial and business matters and/or to employ a
purchaser representative reasonably satisfactory to the Company who is
knowledgeable and experienced in financial and business matters, and that he or
she is capable of evaluating, alone or together with the purchaser
representative, the merits and risks of exercising the Stock Award; and (2) to
give written 


                                       18
<PAGE>   11

assurances satisfactory to the Company stating that such person is acquiring the
stock subject to the Stock Award for such person's own account and not with any
present intention of selling or otherwise distributing the stock. The foregoing
requirements, and any assurances given pursuant to such requirements, shall be
inoperative if (i) the issuance of the shares upon the exercise or acquisition
of stock under the Stock Award has been registered under a then currently
effective registration statement under the Securities Act, or (ii) as to any
particular requirement, a determination is made by counsel for the Company that
such requirement need not be met in the circumstances under the then applicable
securities laws. The Company may, upon advice of counsel to the Company, place
legends on stock certificates issued under the Plan as such counsel deems
necessary or appropriate in order to comply with applicable securities laws,
including, but not limited to, legends restricting the transfer of the stock.

         (f) To the extent provided by the terms of a Stock Award Agreement, the
person to whom a Stock Award is granted may satisfy any federal, state or local
tax withholding obligation relating to the exercise or acquisition of stock
under a Stock Award by any of the following means or by a combination of such
means: (1) tendering a cash payment; (2) authorizing the Company to withhold
shares from the shares of the Common Stock otherwise issuable to the participant
as a result of the exercise or acquisition of stock under the Stock Award; or
(3) delivering to the Company owned and unencumbered shares of the Common Stock
of the Company.

12.      ADJUSTMENTS UPON CHANGES IN STOCK.

         (a) If any change is made in the stock subject to the Plan, or subject
to any Stock Award, without the receipt of consideration by the Company (through
merger, consolidation, reorganization, recapitalization, reincorporation, stock
dividend, dividend in property other than cash, stock split, liquidating
dividend, combination of shares, exchange of shares, change in corporate
structure or other transaction not involving the receipt of consideration by the
Company), the Plan will be appropriately adjusted in the class(es) and maximum
number of shares subject to the Plan and the maximum number of shares subject to
award to any person during any calendar year, and the outstanding Stock Awards
will be appropriately adjusted in the class(es) and number of shares and price
per share of stock subject to such outstanding Stock Awards. Such adjustments
shall be made by the Board or Committee, the determination of which shall be
final, binding and conclusive. (The conversion of any convertible securities of
the Company shall not be treated as a "transaction not involving the receipt of
consideration by the Company.")

         (B) In the event of a Change in Control, (i) any surviving or acquiring
corporation shall assume Stock Awards outstanding under the Plan or shall
substitute similar Stock Awards for those outstanding under the Plan, or (ii) in
the event any surviving or acquiring corporation refuses to assume such Stock
Awards or to substitute similar Stock Awards for those outstanding under the
Plan, (A) with respect to Stock Awards held by persons then performing services
as Employees, Directors or Consultants, the vesting of such Stock Awards and the
time during which such Stock Awards may be exercised shall be accelerated prior
to such event and the Stock Awards terminated if not exercised after such
acceleration and at or prior to such event, and (B) with respect to any other
Stock Awards outstanding under the Plan, such Stock Awards shall be terminated
if not exercised prior to such event.

         In addition, with respect to any person who was providing services as
an Employee, Director or Consultant immediately prior to the consummation of the
Change in Control, any Stock Awards held by 


                                       19
<PAGE>   12

such persons shall immediately become fully vested and exercisable, and any
repurchase right by the Company with respect to shares acquired by such person
under a Stock Award shall lapse, if such person's Continuous Status as an
Employee, Director or Consultant is terminated other than for Cause within
twelve (12) months following consummation of the Change in Control. For purposes
of the Plan, "Cause" shall mean willful conduct that is materially injurious to
the business of the person's employer, whether financial or otherwise.

         For purposes of this Plan, "Change in Control" means: (1) a
dissolution, liquidation, or sale of all or substantially all of the assets of
the Company; (2) a merger or consolidation in which the Company is not the
surviving corporation; (3) a reverse merger in which the Company is the
surviving corporation but the shares of the Company's common shares outstanding
immediately preceding the merger are converted by virtue of the merger into
other property, whether in the form of securities, cash or otherwise; or (4) the
acquisition by any person, entity or group within the meaning of Section 13(d)
or 14(d) of the Exchange Act, or any comparable successor provisions (excluding
any employee benefit plan, or related trust, sponsored or maintained by the
Company or any Affiliate of the Company) of the beneficial ownership (within the
meaning of Rule 13d-3 promulgated under the Exchange Act, or comparable
successor rule) of securities of the Company representing at least fifty percent
(50%) of the combined voting power entitled to vote in the election of
directors.

13.      AMENDMENT OF THE PLAN AND STOCK AWARDS.

         (a) The Board at any time, and from time to time, may amend the Plan.
However, except as provided in Section 12 relating to adjustments upon changes
in stock, no amendment shall be effective unless approved by the stockholders of
the Company to the extent stockholder approval is necessary for the Plan to
satisfy the requirements of Section 422 of the Code, Rule 16b-3 or any Nasdaq or
securities exchange listing requirements.

         (b) The Board may in its sole discretion submit any other amendment to
the Plan for stockholder approval, including, but not limited to, amendments to
the Plan intended to satisfy the requirements of Section 162(m) of the Code and
the regulations thereunder regarding the exclusion of performance-based
compensation from the limit on corporate deductibility of compensation paid to
certain executive officers.

         (c) It is expressly contemplated that the Board may amend the Plan in
any respect the Board deems necessary or advisable to provide eligible
Employees, Directors or Consultants with the maximum benefits provided or to be
provided under the provisions of the Code and the regulations promulgated
thereunder relating to Incentive Stock Options and/or to bring the Plan and/or
Incentive Stock Options granted under it into compliance therewith.

         (d) Rights and obligations under any Stock Award granted before
amendment of the Plan shall not be impaired by any amendment of the Plan unless
(I) the Company requests the consent of the person to whom the Stock Award was
granted and (ii) such person consents in writing.

         (e) The Board at any time, and from time to time, may amend the terms
of any one or more Stock Award; provided, however, that the rights and
obligations under any Stock Award shall not be 


                                       20
<PAGE>   13

impaired by any such amendment unless (i) the Company requests the consent of
the person to whom the Stock Award was granted and (ii) such person consents in
writing.

14.      TERMINATION OR SUSPENSION OF THE PLAN.

         (a) The Board may suspend or terminate the Plan at any time. Unless
sooner terminated, the Plan shall terminate ten (10) years from the date the
Plan is adopted by the Board or approved by the stockholders of the Company,
whichever is earlier. No Stock Awards may be granted under the Plan while the
Plan is suspended or after it is terminated.

         (b) Rights and obligations under any Stock Award granted while the Plan
is in effect shall not be impaired by suspension or termination of the Plan,
except with the consent of the person to whom the Stock Award was granted.

15.      EFFECTIVE DATE OF PLAN.

         This Plan shall become effective on the date of adoption by the Board,
but no Stock Awards granted under the Plan shall be exercised unless and until
the Plan has been approved by the stockholders of the Company, which approval
shall be within twelve (12) months before or after the date the Plan is adopted
by the Board.



                                       21

<PAGE>   1

                                                                            99.2

                                 METRICOM, INC.

                     1997 NON-OFFICER EQUITY INCENTIVE PLAN

                   ADOPTED BY THE BOARD OF DIRECTORS ON MAY 1,
                    1997 AMENDED BY THE BOARD OF DIRECTORS ON
                                 APRIL 29, 1998


1.       PURPOSES.

         (a) The purpose of the Plan is to provide a means by which selected
Employees of and Consultants to the Company, and its Affiliates, may be given an
opportunity to benefit from increases in value of the Company's common stock
("Common Stock") through the granting of (i) Nonstatutory Stock Options, (ii)
stock bonuses, and (iii) rights to purchase restricted stock, all as defined
below.

         (b) The Company, by means of the Plan, seeks to retain the services of
persons (other than persons serving as Officers or Directors of the Company or
its Affiliates) who are now Employees of or Consultants to the Company or its
Affiliates, to secure and retain the services of new Employees and Consultants,
and to provide incentives for such persons to exert maximum efforts for the
success of the Company and its Affiliates.

         (c) The Company intends that the Stock Awards issued under the Plan
shall, in the discretion of the Board or any Committee to which responsibility
for administration of the Plan has been delegated pursuant to subsection 3(c),
be either (i) Nonstatutory Stock Options granted pursuant to Section 6 hereof,
or (ii) stock bonuses or rights to purchase restricted stock granted pursuant to
Section 7 hereof.

2.       DEFINITIONS.

         (a) "AFFILIATE" means any parent corporation or subsidiary corporation,
whether now or hereafter existing, as those terms are defined in Sections 424(e)
and (f), respectively, of the Code.

         (b) "BOARD" means the Board of Directors of the Company.

         (c) "CODE" means the Internal Revenue Code of 1986, as amended.

         (d) "COMMITTEE" means a Committee appointed by the Board in accordance
with subsection 3(c) of the Plan.

         (e) "COMPANY" means Metricom, Inc., a Delaware corporation.

         (f) "CONSULTANT" means any person, including an advisor, engaged by the
Company or an Affiliate to render consulting services and who is compensated for
such services, provided that the term "Consultant" shall not include those
persons who render services as a Director.



                                       22
<PAGE>   2

         (g) "CONTINUOUS STATUS AS AN EMPLOYEE OR CONSULTANT" means that the
service of an individual to the Company, whether as an Employee or Consultant,
is not interrupted or terminated. The Board, in its sole discretion, may
determine whether Continuous Status as an Employee or Consultant shall be
considered interrupted in the case of: (i) any leave of absence approved by the
Board, including sick leave, military leave, or any other personal leave; or
(ii) transfers between locations of the Company or between the Company,
Affiliates or their successors.

         (h) "DIRECTOR" means a member of the Board.

         (i) "DISABILITY" means permanent and total disability as defined in
Section 22(e)(3) of the Code.

         (j) "EMPLOYEE" means any person employed by the Company or any
Affiliate of the Company. Neither service as a Director nor payment of a
director's fee by the Company shall be sufficient to constitute "employment" by
the Company.

         (k) "EXCHANGE ACT" means the Securities Exchange Act of 1934, as
amended.

         (l) "FAIR MARKET VALUE" means, as of any date, the value of the Common
Stock, determined as follows:

                  (1) If the Common Stock is listed on any established stock
exchange or traded on the Nasdaq National Market or The Nasdaq SmallCap Market,
the Fair Market Value of a share of Common Stock shall be the closing sales
price for such stock (or the closing bid, if no sales were reported) as quoted
on such exchange or market (or the exchange or market with the greatest volume
of trading in the Common Stock) on the last market trading day prior to the day
of determination, as reported in The Wall Street Journal or such other source as
the Board deems reliable.

                  (2) In the absence of such markets for the Common Stock, the
Fair Market Value shall be determined in good faith by the Board.

         (m) "NONSTATUTORY STOCK OPTION" means an Option not intended to qualify
as an incentive stock option pursuant to Section 422 of the Code and the
regulations promulgated thereunder.

         (n) "OFFICER" means a person who is an officer of the Company within
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

         (o) "OPTION" means a stock option granted pursuant to the Plan.

         (p) "OPTION AGREEMENT" means a written agreement between the Company
and an Optionee evidencing the terms and conditions of an individual Option
grant. Each Option Agreement shall be subject to the terms and conditions of the
Plan.

         (q) "OPTIONEE" means an Employee or Consultant who holds an outstanding
Option.

         (r) "PLAN" means this 1997 Non-Officer Equity Incentive Plan.



                                       23
<PAGE>   3

         (s) "STOCK AWARD" means any right granted under the Plan, including any
Option, any stock bonus and any right to purchase restricted stock.

         (t) "STOCK AWARD AGREEMENT" means a written agreement between the
Company and a holder of a Stock Award evidencing the terms and conditions of an
individual Stock Award grant. Each Stock Award Agreement shall be subject to the
terms and conditions of the Plan.

3.       ADMINISTRATION.

         (a) The Plan shall be administered by the Board unless and until the
Board delegates administration to a Committee, as provided in subsection 3(c).

         (b) The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan:

                  (1) To determine from time to time which of the persons
eligible under the Plan shall be granted Stock Awards; when and how each Stock
Award shall be granted; whether a Stock Award will be a Nonstatutory Stock
Option, a stock bonus, a right to purchase restricted stock, or a combination of
the foregoing; the provisions of each Stock Award granted (which need not be
identical), including the time or times when a person shall be permitted to
receive stock pursuant to a Stock Award; and the number of shares with respect
to which a Stock Award shall be granted to each such person.

                  (2) To construe and interpret the Plan and Stock Awards
granted under it, and to establish, amend and revoke rules and regulations for
its administration. The Board, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan or in any Stock Award Agreement,
in a manner and to the extent it shall deem necessary or expedient to make the
Plan fully effective.

                  (3) To amend the Plan or a Stock Award as provided in Section
12.

                  (4) Generally, to exercise such powers and to perform such
acts as the Board deems necessary or expedient to promote the best interests of
the Company which are not in conflict with the provisions of the Plan.

         (c) The Board may delegate administration of the Plan to a committee
composed of one or more members of the Board (the "Committee"). If
administration is delegated to a Committee, the Committee shall have, in
connection with the administration of the Plan, the powers theretofore possessed
by the Board (and references in this Plan to the Board shall thereafter be to
the Committee), subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the Plan.

4.       SHARES SUBJECT TO THE PLAN.

         (a) Subject to the provisions of Section 11 relating to adjustments
upon changes in stock, the number of shares of stock that may be issued pursuant
to Stock Awards shall not exceed in the aggregate


                                       24
<PAGE>   4

one million three hundred fifty thousand (1,350,000) shares of Common Stock. If
any Stock Award shall for any reason expire or otherwise terminate, in whole or
in part, without having been exercised in full, the stock not acquired under
such Stock Award shall revert to and again become available for issuance under
the Plan.

         (b) The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.

5.       ELIGIBILITY.

         Stock Awards may be granted only to Employees or Consultants who are
not (i) Officers, (ii) Directors, or (iii) then subject to Section 16 of the
Exchange Act.

6.       OPTION PROVISIONS.

         Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The provisions of separate
Options need not be identical, but each Option shall include (through
incorporation of provisions hereof by reference in the Option or otherwise) the
substance of each of the following provisions:

         (a) TERM. No Option shall be exercisable after the expiration of ten
(10) years from the date it was granted.

         (b) PRICE. The exercise price of each Nonstatutory Stock Option shall
be not less than eighty-five percent (85%) of the Fair Market Value of the stock
subject to the Option on the date the Option is granted.

         (c) CONSIDERATION. The purchase price of stock acquired pursuant to an
Option shall be paid, to the extent permitted by applicable statutes and
regulations, either (i) in cash at the time the Option is exercised, or (ii) at
the discretion of the Board or the Committee, at the time of the grant of the
Option, (A) by delivery to the Company of other shares of Common Stock, (B)
according to a deferred payment arrangement, except that payment of the Common
Stock's "par value" (as defined in the Delaware General Corporation Law) shall
not be made by deferred payment or other arrangement (which may include, without
limiting the generality of the foregoing, the use of other shares of Common
Stock) with the person to whom the Option is granted or to whom the Option is
transferred pursuant to subsection 6(d), or (C) in any other form of legal
consideration that may be acceptable to the Board. In the case of any deferred
payment arrangement, interest shall be payable at least annually and shall be
charged at the minimum rate of interest necessary to avoid the treatment as
interest, under any applicable provisions of the Code, of any amounts other than
amounts stated to be interest under the deferred payment arrangement.

         (d) TRANSFERABILITY. An Option may be transferred to the extent
provided in the Option Agreement; provided that if the Option Agreement does not
expressly permit the transfer of an Option, the Option shall not be transferable
except by will, by the laws of descent and distribution or pursuant to a
domestic relations order satisfying the requirements of Rule 16b-3, and shall be
exercisable during the lifetime of the person to whom the Option is granted only
by such person or any transferee pursuant to a 


                                       25
<PAGE>   5

domestic relations order. Notwithstanding the foregoing, the person to whom the
Option is granted may, by delivering written notice to the Company, in a form
satisfactory to the Company, designate a third party who, in the event of the
death of the Optionee, shall thereafter be entitled to exercise the Option.

         (e) VESTING. The total number of shares of stock subject to an Option
may, but need not, be allotted in periodic installments (which may, but need
not, be equal). The Option Agreement may provide that from time to time during
each of such installment periods, the Option may become exercisable ("vest")
with respect to some or all of the shares allotted to that period, and may be
exercised with respect to some or all of the shares allotted to such period
and/or any prior period as to which the Option became vested but was not fully
exercised. The Option may be subject to such other terms and conditions on the
time or times when it may be exercised (which may be based on performance or
other criteria) as the Board may deem appropriate. The vesting provisions of
individual Options may vary. The provisions of this subsection 6(e) are subject
to any Option provisions governing the minimum number of shares as to which an
Option may be exercised.

         (f) TERMINATION OF EMPLOYMENT OR CONSULTING RELATIONSHIP. In the event
an Optionee's Continuous Status as an Employee or Consultant terminates (other
than upon the Optionee's death or disability), the Optionee may exercise his or
her Option within such period of time designated by the Board, which shall in no
event be later than the expiration of the term of the Option as set forth in the
Option Agreement (the "Post-Termination Exercise Period") and only to the extent
that the Optionee was entitled to exercise the Option on the date Optionee's
Continuous Status as an Employee or Consultant terminates. The Board may at any
time, with the consent of the Optionee, extend the Post-Termination Exercise
Period and provide for continued vesting. If, at the date of termination, the
Optionee is not entitled to exercise his or her entire Option, the shares
covered by the unexercisable portion of the Option shall revert to the Plan. If,
after termination, the Optionee does not exercise his or her Option within the
time specified in the Option Agreement or as otherwise determined above, the
Option shall terminate, and the shares covered by such Option shall revert to
the Plan. Notwithstanding the foregoing, the Board shall have the power to
permit an Option to continue to vest during the Post-Termination Exercise
Period.

         An Optionee's Option Agreement may also provide that if the exercise of
the Option following the termination of the Optionee's Continuous Status as an
Employee or Consultant (other than upon the Optionee's death or disability)
would result in liability under Section 16(b) of the Exchange Act, then the
Option shall terminate on the earlier of (i) the expiration of the term of the
Option set forth in the Option Agreement, or (ii) the tenth (10th) day after the
last date on which such exercise would result in such liability under Section
16(b) of the Exchange Act. Finally, an Optionee's Option Agreement may also
provide that if the exercise of the Option following the termination of the
Optionee's Continuous Status as an Employee or Consultant (other than upon the
Optionee's death or disability) would be prohibited at any time solely because
the issuance of shares would violate the registration requirements under the
Act, then the Option shall terminate on the earlier of (i) the expiration of the
term of the Option set forth in the first paragraph of this subsection 6(f), or
(ii) the expiration of a period of three (3) months after the termination of the
Optionee's Continuous Status as an Employee or Consultant during which the
exercise of the Option would not be in violation of such registration
requirements.



                                       26
<PAGE>   6

         (g) DISABILITY OF OPTIONEE. In the event an Optionee's Continuous
Status as an Employee or Consultant terminates as a result of the Optionee's
Disability, the Optionee may exercise his or her Option (to the extent that the
Optionee was entitled to exercise it as of the date of termination), but only
within such period of time ending on the earlier of (i) the date twelve (12)
months following such termination (or such longer or shorter period specified in
the Option Agreement), or (ii) the expiration of the term of the Option as set
forth in the Option Agreement. If, at the date of termination, the Optionee is
not entitled to exercise his or her entire Option, the shares covered by the
unexercisable portion of the Option shall revert to and again become available
for issuance under the Plan. If, after termination, the Optionee does not
exercise his or her Option within the time specified herein, the Option shall
terminate, and the shares covered by such Option shall revert to and again
become available for issuance under the Plan.

         (h) DEATH OF OPTIONEE. In the event of the death of an Optionee during,
or within a period specified in the Option Agreement after the termination of,
the Optionee's Continuous Status as an Employee or Consultant, the Option may be
exercised (to the extent the Optionee was entitled to exercise the Option as of
the date of death) by the Optionee's estate, by a person who acquired the right
to exercise the Option by bequest or inheritance, but only within the period
ending on the earlier of (i) the date eighteen (18) months following the date of
death (or such longer or shorter period specified in the Option Agreement), or
(ii) the expiration of the term of such Option as set forth in the Option
Agreement. If, at the time of death, the Optionee was not entitled to exercise
his or her entire Option, the shares covered by the unexercisable portion of the
Option shall revert to and again become available for issuance under the Plan.
If, after death, the Option is not exercised within the time specified herein,
the Option shall terminate, and the shares covered by such Option shall revert
to and again become available for issuance under the Plan.

7.       TERMS OF STOCK BONUSES AND PURCHASES OF RESTRICTED STOCK.

         Each stock bonus or restricted stock purchase agreement shall be in
such form and shall contain such terms and conditions as the Board or the
Committee shall deem appropriate. The terms and conditions of stock bonus or
restricted stock purchase agreements may change from time to time, and the terms
and conditions of separate agreements need not be identical, but each stock
bonus or restricted stock purchase agreement shall include (through
incorporation of provisions hereof by reference in the agreement or otherwise)
the substance of each of the following provisions as appropriate:

         (a) PURCHASE PRICE. The purchase price under each restricted stock
purchase agreement shall be such amount as the Board or Committee shall
determine and designate in such agreement, but in no event shall the purchase
price be less than eighty-five percent (85%) of the Fair Market Value of the
Common Stock on the date such award is made. Notwithstanding the foregoing, the
Board or the Committee may determine that eligible participants in the Plan may
be awarded stock pursuant to a stock bonus agreement in consideration for past
services actually rendered to the Company or for its benefit.

         (b) TRANSFERABILITY. No rights under a stock bonus or restricted stock
purchase agreement shall be transferable except by will or the laws of descent
and distribution, unless the applicable Stock Award Agreement expressly provides
for other transferability.



                                       27
<PAGE>   7

         (c) CONSIDERATION. The purchase price of stock acquired pursuant to a
stock purchase agreement shall be paid either: (i) in cash at the time of
purchase; (ii) at the discretion of the Board or the Committee, according to a
deferred payment or other arrangement, except that payment of the Common Stock's
"par value" (as defined in the Delaware General Corporation Law) shall not be
made by deferred payment or other arrangement (which may include, without
limiting the generality of the foregoing, the use of other shares of Common
Stock) with the person to whom the stock is sold; or (iii) in any other form of
legal consideration that may be acceptable to the Board or the Committee in its
discretion. Notwithstanding the foregoing, the Board or the Committee to which
administration of the Plan has been delegated may award stock pursuant to a
stock bonus agreement in consideration for past services actually rendered to
the Company or for its benefit.

         (d) VESTING. Shares of stock sold or awarded under the Plan may, but
need not, be subject to a repurchase option in favor of the Company in
accordance with a vesting schedule to be determined by the Board or the
Committee.

         (e) TERMINATION OF EMPLOYMENT OR CONSULTING RELATIONSHIP. In the event
a Participant's Continuous Status as an Employee or Consultant terminates, the
Company may repurchase or otherwise reacquire, subject to the limitations
described in subsection 7(d), any or all of the shares of stock held by that
person which have not vested as of the date of termination under the terms of
the stock bonus or restricted stock purchase agreement between the Company and
such person.

8.       COVENANTS OF THE COMPANY.

         (a) During the terms of the Stock Awards, the Company shall keep
available at all times the number of shares of stock required to satisfy such
Stock Awards.

         (b) The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares of stock upon exercise of the Stock Award; provided,
however, that this undertaking shall not require the Company to register under
the Securities Act of 1933, as amended (the "Securities Act") either the Plan,
any Stock Award or any stock issued or issuable pursuant to any such Stock
Award. If, after reasonable efforts, the Company is unable to obtain from any
such regulatory commission or agency the authority which counsel for the Company
deems necessary for the lawful issuance and sale of stock under the Plan, the
Company shall be relieved from any liability for failure to issue and sell stock
upon exercise of such Stock Awards unless and until such authority is obtained.

9.       USE OF PROCEEDS FROM STOCK.

         Proceeds from the sale of stock pursuant to Stock Awards shall
constitute general funds of the Company.

10.      MISCELLANEOUS.

         (a) The Board shall have the power to accelerate the time at which a
Stock Award may first be exercised or the time during which a Stock Award or any
part thereof will vest pursuant to subsection 


                                       28
<PAGE>   8

6(e) or 7(d), notwithstanding the provisions in the Stock Award stating the time
at which it may first be exercised or the time during which it will vest.

         (b) Neither an Employee or Consultant, nor any person to whom a Stock
Award is transferred under subsection 6(d) or 7(b) shall be deemed to be the
holder of, or to have any of the rights of a holder with respect to, any shares
subject to such Stock Award unless and until such person has satisfied all
requirements for exercise of the Stock Award pursuant to its terms.

         (c) Nothing in the Plan or any instrument executed or Stock Award
granted pursuant thereto shall confer upon any Employee, Consultant or other
holder of Stock Awards any right to continue in the employ of the Company or any
Affiliate (or to continue acting as a Consultant) or shall affect the right of
the Company or any Affiliate to terminate the employment of any Employee with or
without cause, or to terminate the relationship of any Consultant in accordance
with the terms of that Consultant's agreement with the Company or Affiliate to
which such Consultant is providing services.

         (d) The Company may require any person to whom a Stock Award is
granted, or any person to whom a Stock Award is transferred pursuant to
subsection 6(d) or 7(b), as a condition of exercising or acquiring stock under
any Stock Award, (1) to give written assurances satisfactory to the Company as
to such person's knowledge and experience in financial and business matters
and/or to employ a purchaser representative reasonably satisfactory to the
Company who is knowledgeable and experienced in financial and business matters,
and that he or she is capable of evaluating, alone or together with the
purchaser representative, the merits and risks of exercising the Stock Award;
and (2) to give written assurances satisfactory to the Company stating that such
person is acquiring the stock subject to the Stock Award for such person's own
account and not with any present intention of selling or otherwise distributing
the stock. The foregoing requirements, and any assurances given pursuant to such
requirements, shall be inoperative if (i) the issuance of the shares upon the
exercise or acquisition of stock under the Stock Award has been registered under
a then currently effective registration statement under the Securities Act, or
(ii) as to any particular requirement, a determination is made by counsel for
the Company that such requirement need not be met in the circumstances under the
then applicable securities laws. The Company may require the holder of the Stock
Award to provide such other representations, written assurances or information
which the Company shall determine is necessary, desirable or appropriate to
comply with applicable securities and other laws as a condition of granting a
Stock Award to such person or permitting the holder of the Stock Award to
exercise the Stock Award. The Company may, upon advice of counsel to the
Company, place legends on stock certificates issued under the Plan as such
counsel deems necessary or appropriate in order to comply with applicable
securities laws, including, but not limited to, legends restricting the transfer
of the stock.

         (e) To the extent provided by the terms of a Stock Award Agreement, the
person to whom a Stock Award is granted may satisfy any federal, state or local
tax withholding obligation relating to the exercise or acquisition of stock
under a Stock Award by any of the following means or by a combination of such
means: (1) tendering a cash payment; (2) authorizing the Company to withhold
shares from the shares of Common Stock otherwise issuable to the participant as
a result of the exercise or acquisition of stock under the Stock Award; or (3)
delivering to the Company owned and unencumbered shares of Common Stock.

11.      ADJUSTMENTS UPON CHANGES IN STOCK.



                                       29
<PAGE>   9

         (a) If any change is made in the stock subject to the Plan, or subject
to any Stock Award, without the receipt of consideration by the Company (through
merger, consolidation, reorganization, recapitalization, reincorporation, stock
dividend, dividend in property other than cash, stock split, liquidating
dividend, combination of shares, exchange of shares, change in corporate
structure or other transaction not involving the receipt of consideration by the
Company), the Plan will be appropriately adjusted in the class(es) and maximum
number of shares subject to the Plan and the maximum number of shares subject to
award to any person during any calendar year, and the outstanding Stock Awards
will be appropriately adjusted in the class(es) and number of shares and price
per share of stock subject to such outstanding Stock Awards. Such adjustments
shall be made by the Board or Committee, the determination of which shall be
final, binding and conclusive. (The conversion of any convertible securities of
the Company shall not be treated as a "transaction not involving the receipt of
consideration by the Company.")

         (b) In the event of a Change in Control, (i) any surviving or acquiring
corporation shall assume Stock Awards outstanding under the Plan or shall
substitute similar Stock Awards for those outstanding under the Plan, or (ii) in
the event any surviving or acquiring corporation refuses to assume such Stock
Awards or to substitute similar Stock Awards for those outstanding under the
Plan, (A) with respect to Stock Awards held by persons then performing services
as Employees or Consultants, the vesting of such Stock Awards and the time
during which such Stock Awards may be exercised shall be accelerated prior to
such event and the Stock Awards terminated if not exercised after such
acceleration and at or prior to such event, and (B) with respect to any other
Stock Awards outstanding under the Plan, such Stock Awards shall be terminated
if not exercised prior to such event.

         In addition, with respect to any person who was providing services as
an Employee or Consultant immediately prior to the consummation of the Change in
Control, any Stock Awards held by such persons shall immediately become fully
vested and exercisable, and any repurchase right by the Company with respect to
shares acquired by such person under a Stock Award shall lapse, if such person's
Continuous Status as an Employee or Consultant is terminated other than for
Cause within twelve (12) months following consummation of the Change in Control.
For purposes of the Plan, "Cause" shall mean willful conduct that is materially
injurious to the business of the person's employer, whether financial or
otherwise.

         For purposes of this Plan, "Change in Control" means: (1) a
dissolution, liquidation, or sale of all or substantially all of the assets of
the Company; (2) a merger or consolidation in which the Company is not the
surviving corporation; (3) a reverse merger in which the Company is the
surviving corporation but the shares of the Company's common shares outstanding
immediately preceding the merger are converted by virtue of the merger into
other property, whether in the form of securities, cash or otherwise; or (4) the
acquisition by any person, entity or group within the meaning of Section 13(d)
or 14(d) of the Exchange Act, or any comparable successor provisions (excluding
any employee benefit plan, or related trust, sponsored or maintained by the
Company or any Affiliate of the Company) of the beneficial ownership (within the
meaning of Rule 13d-3 promulgated under the Exchange Act, or comparable
successor rule) of securities of the Company representing at least fifty percent
(50%) of the combined voting power entitled to vote in the election of
directors.

12.      AMENDMENT OF THE PLAN AND STOCK AWARDS.



                                       30
<PAGE>   10

         (a) The Board at any time, and from time to time, may amend the Plan.

         (b) The Board, in its sole discretion, may submit the Plan and/or any
amendment to the Plan for stockholder approval.

         (c) It is expressly contemplated that the Board may amend the Plan in
any respect the Board deems necessary or advisable to provide those eligible
with the maximum benefits provided or to be provided under the provisions of the
Code and the regulations promulgated thereunder.

         (d) Rights and obligations under any Stock Award granted before
amendment of the Plan shall not be impaired by any amendment of the Plan unless
(i) the Company requests the consent of the person to whom the Stock Award was
granted and (ii) such person consents in writing.

         (e) The Board at any time, and from time to time, may amend the terms
of any one or more Stock Award; provided, however, that the rights and
obligations under any Stock Award shall not be impaired by any such amendment
unless (i) the Company requests the consent of the person to whom the Stock
Award was granted and (ii) such person consents in writing.

13.      TERMINATION OR SUSPENSION OF THE PLAN.

         (a) The Board may suspend or terminate the Plan at any time. Unless
sooner terminated, the Plan shall terminate on April 30, 2007, which shall be
within ten (10) years from the date the Plan is adopted by the Board. No Stock
Awards may be granted under the Plan while the Plan is suspended or after it is
terminated.

         (b) Rights and obligations under any Stock Award granted while the Plan
is in effect shall not be impaired by suspension or termination of the Plan,
except with the written consent of the person to whom the Stock Award was
granted.

14.      EFFECTIVE DATE OF PLAN.

         The Plan shall become effective on May 1, 1997.



                                       31

<PAGE>   1

                                                                            99.3

                                 METRICOM, INC.

                 1993 NON-EMPLOYEE DIRECTORS' STOCK OPTION PLAN

                            Adopted February 9, 1993
                            Amended November 1, 1993
                           Approved December 23, 1993
                              Amended January 1995
                              Approved May 16, 1995
                              Amended June 6, 1996
                             Approved August 7, 1996
                            Amended January 30, 1998
                             Amended April 29, 1998
                             Approved June 26, 1998


1.       PURPOSE

         (a) The purpose of the 1993 Non-Employee Directors' Stock Option Plan
(the "Plan") is to provide a means by which each director of Metricom, Inc. (the
"Company") who is not otherwise an employee of the Company or of any Affiliate
of the Company (each such person being hereafter referred to as a "Non-Employee
Director") will be given an opportunity to purchase stock of the Company.

         (b) The word "Affiliate" as used in the Plan means any parent
corporation or subsidiary corporation of the Company as those terms are defined
in Sections 424(e) and (f), respectively, of the Internal Revenue Code of 1986,
as amended from time to time (the "Code").

         (c) The Company, by means of the Plan, seeks to retain the services of
persons now serving as Non-Employee Directors of the Company, to secure and
retain the services of persons capable of serving in such capacity, and to
provide incentives for such persons to exert maximum efforts for the success of
the Company.

2.       ADMINISTRATION

         (a) 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, as provided in subparagraph 2(b).

         (b) The Board may delegate administration of the Plan to a committee
composed of not fewer than two (2) members of the Board (the "Committee"). If
administration is delegated to a Committee, the Committee shall have, in
connection with the administration of the Plan, the powers theretofore possessed
by the Board, subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the Plan.



                                       32
<PAGE>   2

3.       SHARES SUBJECT TO THE PLAN

         (a) Subject to the provisions of paragraph 10 relating to adjustments
upon changes in stock, the stock that may be sold pursuant to options granted
under the Plan shall not exceed in the aggregate three hundred seventy-five
thousand (375,000) shares of the Company's common stock. If any option granted
under the Plan shall for any reason expire or otherwise terminate without having
been exercised in full, the stock not purchased under such option shall again
become available for the Plan.

         (b) The stock subject to the Plan may be unissued shares or reacquired
shares, bought on the market or otherwise.

4.       ELIGIBILITY

         Options shall be granted only to Non-Employee Directors of the Company.

5.       NON-DISCRETIONARY GRANTS

         (a) Each person who is first elected or appointed as a Non-Employee
Director on or after June 6, 1996 shall, upon such date of initial election or
appointment, be granted an option to purchase seven thousand (7,000) shares of
common stock of the Company on the terms and conditions set forth herein.

         (b) On January 1 of each calendar year thereafter, each person who is
serving as a Non-Employee Director shall be granted an option to purchase seven
thousand (7,000) shares of common stock of the Company on the terms and
conditions set forth herein, provided such person has continuously served as a
Non-Employee Director for at least three (3) months prior to the January 1 grant
date.

6.       OPTION PROVISIONS

         Each option shall contain the following terms and conditions:
         (a) The term of each option commences on the date it is granted and,
unless sooner terminated as set forth herein, expires on the date ("Expiration
Date") ten (10) years from the date of grant. If the optionee's service as a
Non-Employee Director of the Company terminates for any reason or for no reason,
the option shall terminate on the earlier of the Expiration Date or the date
three (3) months following the date of termination of service; provided,
however, that if such termination of service is due to the optionee's death, the
option shall terminate on the earlier of the Expiration Date or eighteen (18)
months following the date of the optionee's death. In any and all circumstances,
an option may be exercised following termination of the optionee's service as a
Non-Employee Director of the Company only as to that number of shares as to
which it was exercisable on the date of termination of such service under the
provisions of subparagraph 6(e).

         (b) Subject to subparagraph 4(b), the exercise price of each option
shall be one hundred percent (100%) of the fair market value of the stock
subject to such option on the date such option is granted.



                                       33
<PAGE>   3

         (c) Payment of the exercise price of each option is due in full in cash
upon any exercise.

         (d) An option shall not be transferable except by will or by the laws
of descent and distribution, and shall be exercisable during the lifetime of the
person to whom the option is granted only by such person or by his guardian or
legal representative.

         (e) The option shall become exercisable in three (3) equal annual
installments commencing on the date one (1) year after the date of grant of the
option, provided that the optionee has, during the twelve (12)-month period
prior to such annual vesting date, continuously served as a Non-Employee
Director or as an employee of or consultant to the Company or any Affiliate of
the Company, whereupon such option shall become exercisable with respect to that
portion of the shares represented by such installment.

         (f) The Company may require any optionee, or any person to whom an
option is transferred under subparagraph 6(d), as a condition of exercising any
such option: (i) to give written assurances satisfactory to the Company as to
the optionee's knowledge and experience in financial and business matters; and
(ii) to give written assurances satisfactory to the Company stating that such
person is acquiring the stock subject to the option for such person's own
account and not with any present intention of selling or otherwise distributing
the stock. These requirements, and any assurances given pursuant to such
requirements, shall be inoperative if (i) the issuance of the shares upon the
exercise of the option has been registered under a then-currently-effective
registration statement under the Securities Act of 1933, as amended (the
"Securities Act"), or (ii), as to any particular requirement, a determination is
made by counsel for the Company that such requirement need not be met in the
circumstances under the then-applicable securities laws.

         (g) Notwithstanding anything to the contrary contained herein, an
option may not be exercised unless the shares issuable upon exercise of such
option are then registered under the Securities Act or, if such shares are not
then so registered, the Company has determined that such exercise and issuance
would be exempt from the registration requirements of the Securities Act.

         (h) Notwithstanding anything to the contrary contained herein, a
Non-Employee Director's service as such shall be deemed to continue for purposes
of subparagraphs 6(a) and 6(e) above if such Non-Employee Director terminates
service and immediately becomes a member of the Company's Advisory Board;
provided, however, that a Non-Employee Director shall be credited with such
deemed service only until the date of termination of membership on the Advisory
Board. The last day of such deemed period of service as a Non-Employee Director
shall be considered the last day of actual service as a Non-Employee Director
for purposes of subparagraphs 6(a) and 6(e) above.


7.       COVENANTS OF THE COMPANY

         (a) During the terms of the options granted under the Plan, the Company
shall keep available at all times the number of shares of stock required to
satisfy such options.

         (b) The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares of stock upon 


                                       34
<PAGE>   4

exercise of the options granted under the Plan; provided, however, that this
undertaking shall not require the Company to register under the Securities Act
either the Plan, any option granted under the Plan, or any stock issued or
issuable pursuant to any such option. If the Company is unable to obtain from
any such regulatory commission or agency the authority which counsel for the
Company deems necessary for the lawful issuance and sale of stock under the
Plan, the Company shall be relieved from any liability for failure to issue and
sell stock upon exercise of such options.

8.       USE OF PROCEEDS FROM STOCK

         Proceeds from the sale of stock pursuant to options granted under the
Plan shall constitute general funds of the Company.

9.       MISCELLANEOUS

         (a) Neither an optionee nor any person to whom an option is transferred
under subparagraph 6(d) shall be deemed to be the holder of, or to have any of
the rights of a holder with respect to, any shares subject to such option unless
and until such person has satisfied all requirements for exercise of the option
pursuant to its terms.

         (b) Throughout the term of any option granted pursuant to the Plan, the
Company shall make available to the holder of such option, not later than one
hundred twenty (120) days after the close of each of the Company's fiscal years
during the option term, upon request, such financial and other information
regarding the Company as comprises the annual report to the stockholders of the
Company provided for in the Bylaws of the Company and such other information
regarding the Company as the holder of such option may reasonably request.

         (c) Nothing in the Plan or in any instrument executed pursuant thereto
shall confer upon any Non-Employee Director any right to continue in the service
of the Company or any Affiliate or shall affect any right of the Company, its
Board or stockholders or any Affiliate to terminate the service of any
Non-Employee Director with or without cause.

         (d) No Non-Employee Director, individually or as a member of a group,
and no beneficiary or other person claiming under or through him, shall have any
right, title or interest in or to any option reserved for the purposes of the
Plan except as to such shares of common stock, if any, as shall have been
reserved for him pursuant to an option granted to him.

         (e) In connection with each option made pursuant to the Plan, it shall
be a condition precedent to the Company's obligation to issue or transfer shares
to a Non-Employee Director, or to evidence the removal of any restrictions on
transfer, that such Non-Employee Director make arrangements satisfactory to the
Company to insure that the amount of any federal or other withholding tax
required to be withheld with respect to such sale or transfer, or such removal
or lapse, is made available to the Company for timely payment of such tax.



10.      ADJUSTMENTS UPON CHANGES IN STOCK



                                       35
<PAGE>   5

         (a) If any change is made in the stock subject to the Plan, or subject
to any option granted under the Plan (through merger, consolidation,
reorganization, recapitalization, stock dividend, dividend in property other
than cash, stock split, liquidating dividend, combination of shares, exchange of
shares, change in corporate structure or otherwise), the Plan and all
outstanding options thereunder will be appropriately adjusted in the class(es)
and maximum number of shares subject to the Plan and the class(es) and number of
shares and price per share of stock subject to outstanding options.

         (b) In the event of: (1) a merger or consolidation in which the Company
is not the surviving corporation; (2) a reverse merger in which the Company is
the surviving corporation but the shares of the Company's common stock
outstanding immediately preceding the merger are converted by virtue of the
merger into other property, whether in the form of securities, cash or
otherwise; or (3) any other capital reorganization in which more than fifty
percent (50%) of the shares of the Company entitled to vote are exchanged, then,
to the extent permitted by applicable law, the time during which such option may
be exercised shall be accelerated and the options terminated if not exercised
prior to such event.

11.      AMENDMENT OF THE PLAN

         (a) The Board at any time, and from time to time, may amend the Plan,
provided, however, that the Board shall not amend the Plan more than once every
six (6) months, with respect to the provisions of the Plan which relate to the
amount, price and timing of grants, other than to comport with changes in the
Code, the Employee Retirement Income Security Act, or the rules thereunder.
Except as provided in paragraph 10 relating to adjustments upon changes in
stock, no amendment shall be effective unless approved by the stockholders of
the Company within twelve (12) months before or after the adoption of the
amendment, where the amendment will:

                  (i) Increase the number of shares which may be issued under 
the Plan;

                  (ii) Modify the requirements as to eligibility for
participation in the Plan (to the extent such modification requires stockholder
approval in order for the Plan to comply with the requirements of Rule 16b-3);
or

                  (iii) Modify the Plan in any other way if such modification
requires stockholder approval in order for the Plan to comply with the
requirements of Rule 16b-3.

         (b) Rights and obligations under any option granted before any
amendment of the Plan shall not be altered or impaired by such amendment unless
(i) the Company requests the consent of the person to whom the option was
granted and (ii) such person consents in writing.

12.      TERMINATION OR SUSPENSION OF THE PLAN

         (a) The Board may suspend or terminate the Plan at any time. Unless
sooner terminated, the Plan shall terminate on February 8, 2003. No options may
be granted under the Plan while the Plan is suspended or after it is terminated.



                                       36
<PAGE>   6

         (b) Rights and obligations under any option granted while the Plan is
in effect shall not be altered or impaired by suspension or termination of the
Plan, except with the consent of the person to whom the option was granted.

         (c) The Plan shall terminate upon the occurrence of any of the events
described in Section 10(b) above.

13.      EFFECTIVE DATE OF PLAN; CONDITIONS OF EXERCISE

         (a) The Plan shall become effective upon adoption by the Board of
Directors, subject to the condition subsequent that the Plan is approved by the
stockholders of the Company.

         (b) No option granted under the Plan shall be exercised or exercisable
unless and until the condition of subparagraph 13(a) above has been met.



                                       37

<PAGE>   1


                                                                            99.4

                                 METRICOM, INC.

                        1991 EMPLOYEE STOCK PURCHASE PLAN

                            Adopted November 12, 1991
                             Approved March 19, 1992
                              Amended January 1996
                             Approved April 24, 1996
                              Amended November 1996
                             Amended April 29, 1998
                             Approved June 26, 1998


14.      PURPOSE.

         (a) The purpose of the Plan is to provide a means by which employees of
Metricom, Inc., a California corporation (the "Company"), and its Affiliates, as
defined in subparagraph 1(b), which are designated as provided in subparagraph
2(b), may be given an opportunity to purchase stock of the Company.

         (b) The word "Affiliate" as used in the Plan means any parent
corporation or subsidiary corporation of the Company, as those terms are defined
in Sections 424(e) and (f), respectively, of the Internal Revenue Code of 1986,
as amended (the "Code").

         (c) The Company, by means of the Plan, seeks to retain the services of
its employees, to secure and retain the services of new employees, and to
provide incentives for such persons to exert maximum efforts for the success of
the Company.

         (d) The Company intends that the rights to purchase stock of the
Company granted under the Plan be considered options issued under an "employee
stock purchase plan" as that term is defined in Section 423(b) of the Code.

15.      ADMINISTRATION.

         (a) The Plan shall be administered by the Board of Directors (the
"Board") of the Company unless and until the Board delegates administration to a
Committee, as provided in subparagraph 2(c). Whether or not the Board has
delegated administration, the Board shall have the final power to determine all
questions of policy and expediency that may arise in the administration of the
Plan.

         (b) The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan:

                  (i) To determine when and how rights to purchase stock shall
be granted and the provisions of each offering of such rights (which need not be
identical).



                                       38
<PAGE>   2

                  (ii) To designate from time to time which Affiliates of the
Company shall be eligible to participate in the Plan.

                  (iii) To construe and interpret the Plan and rights granted
under it, and to establish, amend and revoke rules and regulations for its
administration. The Board, in the exercise of this power, may correct any
defect, omission or inconsistency in the Plan, in a manner and to the extent it
shall deem necessary or expedient to make the Plan fully effective.

                  (iv) To amend the Plan as provided in paragraph 13.

                  (v) Generally, to exercise such powers and to perform such
acts as the Board deems necessary or expedient to promote the best interests of
the Company.

         (c) The Board may delegate administration of the Plan to a Committee
composed of not fewer than two (2) members of the Board (the "Committee"). If
administration is delegated to a Committee, the Committee shall have, in
connection with the administration of the Plan, the powers theretofore possessed
by the Board, subject, however, to such resolutions, not inconsistent with the
provisions of the Plan, as may be adopted from time to time by the Board. The
Board may abolish the Committee at any time and revest in the Board the
administration of the Plan.

16.      SHARES SUBJECT TO THE PLAN.

         Subject to the provisions of paragraph 12 relating to adjustments upon
changes in stock, the stock that may be sold pursuant to rights granted under
the Plan shall not exceed in the aggregate five hundred and fifty thousand
(550,000) shares of the Company's common stock (the "Common Stock"). If any
right granted under the Plan shall for any reason terminate without having been
exercised, the Common Stock not purchased under such right shall again become
available for the Plan.

17.      GRANT OF RIGHTS; OFFERING.

         The Board or the Committee may from time to time grant or provide for
the grant of rights to purchase Common Stock of the Company under the Plan to
eligible employees (an "Offering") on a date or dates (the "Offering Date(s)")
selected by the Board or the Committee. Each Offering shall be in such form and
shall contain such terms and conditions as the Board or the Committee shall deem
appropriate. If an employee has more than one right outstanding under the Plan,
unless he or she otherwise indicates in agreements or notices delivered
hereunder: (1) each agreement or notice delivered by that employee will be
deemed to apply to all of his or her rights under the Plan, and (2) a right with
a lower exercise price (or an earlier-granted right, if two rights have
identical exercise prices), will be exercised to the fullest possible extent
before a right with a higher exercise price (or a later-granted right, if two
rights have identical exercise prices) will be exercised. The provisions of
separate Offerings need not be identical, but each Offering shall include
(through incorporation of the provisions of this Plan by reference in the
Offering or otherwise) the substance of the provisions contained in paragraphs 5
through 8, inclusive.

18.      ELIGIBILITY.



                                       39
<PAGE>   3

         (a) Rights may be granted only to employees of the Company or, as the
Board or the Committee may designate as provided in subparagraph 2(b), to
employees of any Affiliate of the Company. Except as provided in subparagraph
5(b), an employee of the Company or any Affiliate shall not be eligible to be
granted rights under the Plan, unless, on the Offering Date, such employee has
been in the employ of the Company or any Affiliate for such continuous period
preceding such grant as the Board or the Committee may require, but in no event
shall the required period of continuous employment be equal to or greater than
two (2) years. In addition, unless otherwise determined by the Board or the
Committee, no employee of the Company or any Affiliate shall be eligible to be
granted rights under the Plan, unless, on the Offering Date, such employee's
customary employment with the Company or such Affiliate is at least twenty (20)
hours per week and at least five (5) months per calendar year.

         (b) The Board or the Committee may provide that, each person who,
during the course of an Offering, first becomes an eligible employee of the
Company or designated Affiliate will, on a date or dates specified in the
Offering which coincides with the day on which such person becomes an eligible
employee or occurs thereafter, receive a right under that Offering, which right
shall thereafter be deemed to be a part of that Offering. Such right shall have
the same characteristics as any rights originally granted under that Offering,
as described herein, except that:

                  (i) the date on which such right is granted shall be the
"Offering Date" of such right for all purposes, including determination of the
exercise price of such right;

                  (ii) the Offering Period for such right shall begin on its
Offering Date and end coincident with the end of such Offering; and

                  (iii) the Board or the Committee may provide that if such
person first becomes an eligible employee within a specified period of time
before the end of the Offering, he or she will not receive any right under that
Offering.

         (c) No employees shall be eligible for the grant of any rights under
the Plan if, immediately after any such rights are granted, such employee owns
stock possessing five percent (5%) or more of the total combined voting power or
value of all classes of stock of the Company or of any Affiliate. For purposes
of this subparagraph 5(d), the rules of Section 424(d) of the Code shall apply
in determining the stock ownership of any employee, and stock which such
employee may purchase under all outstanding rights and options shall be treated
as stock owned by such employee.

         (d) An eligible employee may be granted rights under the Plan only if
such rights, together with any other rights granted under "employee stock
purchase plans" of the Company and any Affiliates, as specified by Section
423(b)(8) of the Code, do not permit such employee's rights to purchase stock of
the Company or any Affiliate to accrue at a rate which exceeds twenty-five
thousand dollars ($25,000) of fair market value of such stock (determined at the
time such rights are granted) for each calendar year in which such rights are
outstanding at any time.

19.      RIGHTS; PURCHASE PRICE.



                                       40
<PAGE>   4

         (a) On each Offering Date, each eligible employee, pursuant to an
Offering made under the Plan, shall be granted the right to purchase the number
of shares of Common Stock of the Company purchasable with up to fifteen percent
(15%) of such employee's Earnings (as defined in Section 7(a)) during the period
which begins on the Offering Date (or such later date as the Board determines
for a particular Offering) and ends on the date stated in the Offering, which
date shall be no more than twenty-seven (27) months after the Offering Date (the
"Offering Period"). In connection with each Offering made under this Plan, the
Board or the Committee shall specify a maximum number of shares which may be
purchased by any employee as well as a maximum aggregate number of shares which
may be purchased by all eligible employees pursuant to such Offering. In
addition, in connection with each such Offering, the Board or the Committee may
specify a maximum aggregate number of shares which may be purchased by all
eligible employees on any given Exercise Date (as defined in the Offering) under
the Offering. If the aggregate purchase of shares upon exercise of rights
granted under the Offering would exceed any such maximum aggregate number, the
Board or the Committee shall make a pro rata allocation of the shares available
in as nearly a uniform manner as shall be practicable and as it shall deem to be
equitable.

         (b) The purchase price of stock acquired pursuant to rights granted
under the Plan shall be not less than the lesser of:

                  (i)  an amount equal to eighty-five percent (85%) of the fair
 market value of the stock on the Offering Date; or

                  (ii) an amount equal to eight-five percent (85%) of the fair 
market value of the stock on the Exercise Date.

20.      PARTICIPATION; WITHDRAWAL; TERMINATION.

         (a) An eligible employee may become a participant in an Offering by
delivering an agreement to the Company within the time specified in the
Offering, in such form as the Company provides. Each such agreement shall
authorize payroll deductions of up to fifteen percent (15%) of such employee's
Earnings during the Offering Period. "Earnings" is defined as base salary or
wages and including amounts elected to be deferred by the employee (that would
otherwise have been paid) under the Company's 401(k) Plan, and may include or
exclude bonuses, commissions, overtime pay, incentive pay, profit sharing, other
remuneration paid directly to the employee, the cost of employee benefits paid
for by the Company or an Affiliate, education or tuition reimbursements, imputed
income arising under any group insurance or benefit program, traveling expenses,
business and moving expense reimbursements, income received in connection with
stock options, contributions made by the Company or an Affiliate under any
employee benefit plan, and similar items of compensation as determined by the
Board or Committee and as set forth in the Offering. The payroll deductions made
for each participant shall be credited to an account for such participant under
the Plan and shall be deposited with the general funds of the Company. At any
time during the Offering a participant may terminate his or her payroll
deductions. A participant may reduce, increase or begin such payroll deductions
after the beginning of any Offering Period only as provided for in the Offering.
A participant may not make any additional payments into his or her account
unless expressly provided for in the Offering.



                                       41
<PAGE>   5

         (b) If a participant terminates his or her payroll deductions, such
participant may withdraw from the Offering by delivering to the Company a notice
of withdrawal in such form as the Company provides. Such withdrawal may be
elected at any time prior to the end of the Offering Period. Upon such
withdrawal from the Offering by a participant, the Company shall distribute to
such participant all of his or her accumulated payroll deductions (reduced to
the extent, if any, such deductions have been used to acquire stock for the
participant) under the Offering without interest, and such participant's
interest in that Offering shall be automatically terminated. A participant's
withdrawal from an Offering will have no effect upon such participant's
eligibility to participate in any other Offerings under the Plan but such
participant will be required to deliver a new participation agreement in order
to participate in other Offerings under the Plan.

         (c) Rights granted pursuant to any Offering under the Plan shall
terminate immediately upon cessation of any participating employee's employment
with the Company or an Affiliate, for any reason, and the Company shall
distribute to such terminated employee all of his or her accumulated payroll
deductions (reduced to the extent, if any, such deductions have been used to
acquire stock for the terminated employee), without interest; provided, however,
that subject to the right of the terminated employee to withdraw from the
Offering and receive a distribution of his or her accumulated payroll deductions
(as described in paragraph 7(b)), in the event that a participating employee's
employment ceases within three (3) months of the next Exercise Date, the balance
in such employee's account shall be held and used to purchase Common Stock for
the terminated employee on such Exercise Date pursuant to the terms of the
ongoing Offering.

         (d) Rights granted under the Plan shall not be transferable, and shall
be exercisable only by the person to whom such rights are granted.

21.      EXERCISE.

         (a) On each exercise date, as defined in the relevant Offering (an
"Exercise Date"), each participant's accumulated payroll deductions (without any
increase for interest) will be applied to the purchase of whole shares of stock
of the Company, up to the maximum number of shares permitted pursuant to the
terms of the Plan and the applicable Offering, at the purchase price specified
in the Offering. No fractional shares shall be issued upon the exercise of
rights granted under the Plan. The amount, if any, of accumulated payroll
deductions remaining in each participant's account after the purchase of shares
which is less than the amount required to purchase one share of stock on the
final Exercise Date of an Offering shall be held in each such participant's
account for the purchase of shares under the next Offering under the Plan,
unless such participant withdraws from such next Offering, as provided in
subparagraph 7(b), or is no longer eligible to be granted rights under the Plan,
as provided in paragraph 5, in which case such amount shall be distributed to
such participant after such Exercise Date, without interest. The amount, if any,
of accumulated payroll deductions remaining in any participant's account after
the purchase of shares which is equal to the amount required to purchase whole
shares of stock on the final Exercise Date of an Offering shall be distributed
in full to such participant after such Exercise Date, without interest.

         (b) No rights granted under the Plan may be exercised to any extent
unless the Plan (including rights granted thereunder) is covered by an effective
registration statement pursuant to the Securities Act of 1933, as amended. If,
on an Exercise Date of any Offering hereunder, the Plan is not 


                                       42
<PAGE>   6

so registered, no rights granted under the Plan or any Offering shall be
exercised and all payroll deductions accumulated and not previously applied to
the purchase of Common Stock shall be distributed to the participants, without
interest.

22.      COVENANTS OF THE COMPANY.

         (a) During the terms of the rights granted under the Plan, the Company
shall keep available at all times the number of shares of stock required to
satisfy such rights.

         (b) The Company shall seek to obtain from each regulatory commission or
agency having jurisdiction over the Plan such authority as may be required to
issue and sell shares of stock upon exercise of the rights granted under the
Plan. If, after reasonable efforts, the Company is unable to obtain from any
such regulatory commission or agency the authority which counsel for the Company
deems necessary for the lawful issuance and sale of stock under the Plan, the
Company shall be relieved from any liability for failure to issue and sell stock
upon exercise of such rights unless and until such authority is obtained.

23.      USE OF PROCEEDS FROM STOCK.

         Proceeds from the sale of stock pursuant to rights granted under the
Plan shall constitute general funds of the Company.

24.      RIGHTS AS A SHAREHOLDER.

         A participant shall not be deemed to be the holder of, or to have any
of the rights of a holder with respect to, any shares subject to rights granted
under the Plan unless and until certificates representing such shares shall have
been issued.

25.      ADJUSTMENTS UPON CHANGES IN STOCK.

         (a) If any change is made in the stock subject to the Plan, or subject
to any rights granted under the Plan (through merger, consolidation,
reorganization, recapitalization, stock dividend, dividend in property other
than cash, stock split, liquidating dividend, combination of shares, exchange of
shares, change in corporate structure or otherwise), the Board shall make
appropriate adjustments in the maximum number of shares subject to the Plan and
the number of shares and price per share of stock subject to outstanding rights.

         (b) In the event of: (1) a dissolution or liquidation of the Company;
(2) a merger or consolidation in which the Company is not the surviving
corporation; (3) a reverse merger in which the Company is the surviving
corporation but the shares of the Company's Common Stock outstanding immediately
preceding the merger are converted by virtue of the merger into other property,
whether in the form of securities, cash or otherwise; or (4) any other capital
reorganization in which more than fifty percent (50%) of the shares of the
Company entitled to vote are exchanged, then, as determined by the Board in its
sole discretion, any surviving corporation shall assume outstanding rights or
substitute similar rights for those under the Plan, such rights shall continue
in full force and effect, or such rights shall be exercised immediately prior to
such event.

                                       43
<PAGE>   7

26.      AMENDMENT OF THE PLAN.

         (a) The Board at any time, and from time to time, may amend the Plan.
However, except as provided in paragraph 12 relating to adjustments upon changes
in stock, no amendment shall be effective unless approved by the shareholders of
the Company within 12 months before or after the adoption of the amendment,
where the amendment will:

                  (i)  Increase the number of shares reserved for rights under
 the Plan; or

                  (ii) Modify the provisions as to eligibility for participation
in the Plan or modify the Plan in any other way to the extent such modification
requires shareholder approval in order for the Plan to obtain employee stock
purchase plan treatment under Section 423 of the Code.

                  It is expressly contemplated that the Board may amend the Plan
in any respect the Board deems necessary or advisable to provide eligible
employees with the maximum benefits provided or to be provided under the
provisions of the Code and the regulations promulgated thereunder relating to
employee stock purchase plans and/or to bring the Plan and/or rights granted
under it into compliance therewith.

         (b) Rights and obligations under any rights granted before amendment of
the Plan shall not be altered or impaired by any amendment of the Plan, except
with the consent of the person to whom such rights were granted.

27.      TERMINATION OR SUSPENSION OF THE PLAN.

         (a) The Board may suspend or terminate the Plan at any time. Unless
sooner terminated, the Plan shall terminate ten (10) years from the date the
Plan is adopted by the Board or approved by the shareholders of the Company,
whichever is earlier. No rights may be granted under the Plan while the Plan is
suspended or after it is terminated.

         (b) Rights and obligations under any rights granted while the Plan is
in effect shall not be altered or impaired by suspension or termination of the
Plan, except with the consent of the person to whom such rights were granted.



                                       44



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