Document:

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                                                                 EXHIBIT 10.18.3

                      THIRD AMENDMENT TO CREDIT AGREEMENT
                      -----------------------------------

     THIS THIRD AMENDMENT TO CREDIT AGREEMENT (the "Amendment"), dated as of
                                                    ---------
March 28, 2001, is entered into by and among WEST MARINE FINANCE COMPANY, INC.,
a California corporation (the "Company"), BANK OF AMERICA, N.A., as agent for
                               -------
itself and the Banks (the "Agent"), and the several financial institutions party
                           -----
to the Credit Agreement (collectively, the "Banks").
                                            -----

                                    RECITALS
                                    --------

     A.  The Company, Banks, and Agent are parties to a Credit Agreement dated
as of January 13, 2000 (the "Credit Agreement") pursuant to which the Banks have
                             ----------------
extended certain credit facilities to the Company.

     B.  The Company has requested that the Banks agree to certain amendments of
the Credit Agreement.

     C.  The Banks are willing to amend the Credit Agreement, subject to the
terms and conditions of this Amendment.

                                   AGREEMENT
                                   ---------

     NOW, THEREFORE, for valuable consideration, the receipt and adequacy of
which are hereby acknowledged, the parties hereto hereby agree as follows:

     1.  Defined Terms.  Unless otherwise defined herein, capitalized terms used
         -------------
herein shall have the meanings, if any, assigned to them in the Credit
Agreement.

     2.  Amendments to Credit Agreement.
         ------------------------------

         (a)  The first sentence of Section 7.13(a) is amended to read as
follows in its entirety:

                    (a)  not permit the ratio of Funded Debt to EBITDA to exceed
          the ratio indicated below as of the end of each fiscal quarter set
          forth below:

              Fiscal Quarters                    Ratio
              ---------------                 -----------
               4th Qtr 1999                   2.75 to 1.0

               1st Qtr 2000                   3.00 to 1.0

               2nd Qtr 2000                   2.20 to 1.0

               3rd Qtr 2000                   2.00 to 1.0

               4th Qtr 2000                   2.10 to 1.0

               1st Qtr 2001                   3.00 to 1.0

               2nd Qtr 2001 - 4th Qtr 2001    2.00 to 1.0

               1st Qtr 2002                   3.00 to 1.0

               2nd Qtr 2002 and thereafter    2.00 to 1.0

                                      -1-
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          (b)  The definition of "EBITDA" in Section 7.13(a) is amended to read
as follows in its entirety:

                    "EBITDA" means the sum of net income before taxes, plus
                     ------
          interest expense, depreciation, and amortization; provided, however,
          that solely for the purpose of calculating EBITDA as of the end of the
          fourth fiscal quarter of 2000, net income before taxes shall be
          calculated without subtracting a one-time non-cash accounting charge
          in the approximate amount of $2,400,000 related to the pre-tax amount
          of the write-off of uncollected credit balances in the Parent's
          accounts payable.

          (c)  Section 7.13(b) is amended to read as follows in its entirety:

                    (b) achieve a Fixed Charge Coverage Ratio of at least the
          ratio indicated below as of the end of each fiscal quarter set forth
          below:

                     Fiscal Quarters             Ratio
               ---------------------------    -----------
               2nd Qtr 2000 - 3rd Qtr 2001    1.20 to 1.0

               4th Qtr 2001 and thereafter    1.25 to 1.0

          This ratio shall be calculated quarterly using the results of the most
          recently concluded fiscal quarter and each of the three immediately
          preceding fiscal quarters.

                    "Fixed Charge Coverage Ratio" means the ratio obtained by
                     ---------------------------
          dividing the sum of net income after taxes, Rents, and Net Interest
          Expense, by the sum of Rents and Net Interest Expense; provided,
          however, that solely for the purpose of calculating the Fixed Charge
          Coverage Ratio as of the end of the fourth fiscal quarter of 2000, net
          income after taxes shall be calculated without subtracting a one-time
          non-cash accounting charge in the approximate amount of $1,416,000
          related to the after-tax amount of the

                                      -2-
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          write-off of uncollected credit balances in the Parent's accounts
          payable.

                    "Net Interest Expense" means, for any period of
                     --------------------
          determination, interest expense less interest income; provided, that
                                                                --------
          in no event shall Net Interest Expense be less than zero.

                    "Rents" means, for any period of determination, the sum of
                     -----
          rental payments under building leases (including all supplemental
          payments required under store leases based on a percentage of sales
          generated from the leased premises), all common area maintenance
          payments required under building leases, all payments under equipment
          operating leases, all other rental expense, minus all sublease
                                                      -----
          revenue.

          (d)  The first sentence of Section 7.13(d) is amended to read as
follows in its entirety:

                    (d)  maintain Tangible Net Worth at least equal to (i)
          $107,500,000; plus (ii) the sum of 75% of net income after taxes
          (without subtracting losses) earned in each fiscal quarter commencing
          after April 3, 1999 (with the exception of the first fiscal quarter of
          2001, in which case 70% of net income after taxes (without subtracting
          losses) earned in said fiscal quarter shall be included in the
          calculation of Tangible Net Worth); plus (iii) the net proceeds from
          any equity securities issued after the date of this Agreement.

          (e)  Section 8.15 is amended to read as follows in its entirety:

               8.15 Capital Expenditures.  The Company and the Parent shall not,
                    --------------------
          and the Parent shall not suffer or permit any Subsidiary to, make
          expenditures for the acquisition of fixed or capital assets (on an
          aggregate basis for the Company and its Subsidiaries) in excess of the
          amount indicated below for each fiscal quarter set forth below:

                          Fiscal Year                 Amount
                    -------------------------      -----------
                    2000                           $23,500,000

                    2001 and each fiscal year
                    thereafter                     $20,000,000

     3.  Representations and Warranties.  The Company hereby represents and
         ------------------------------
warrants to the Agent and the Banks as follows:

          (a)  No Event of Default has occurred and is continuing.

                                      -3-
<PAGE>

          (b)  The execution, delivery and performance by the Company of this
Amendment have been duly authorized by all necessary corporate and other action
and do not and will not require any registration with, consent or approval of,
notice to or action by, any Person (including any Governmental Authority) in
order to be effective and enforceable.  The Credit Agreement as amended by this
Amendment constitutes the legal, valid and binding obligations of the Company,
enforceable against it in accordance with its respective terms, except as
enforceability may be limited by applicable bankruptcy, insolvency, or similar
laws affecting the enforcement of creditors' rights generally or by equitable
principles relating to enforceability, without defense, counterclaim or offset.

          (c)  All representations and warranties of the Company contained in
the Credit Agreement are true and correct on and as of the date hereof, except
to the extent such representations and warranties expressly refer to an earlier
date, in which case they are true and correct as of such earlier date.

          (d)  The Company is entering into this Amendment on the basis of its
own investigation and for its own reasons, without reliance upon the Agent and
the Banks or any other Person.

     4.  Effective Date.  This Amendment will become effective as of December
         --------------
30, 2000 (the "Effective Date"), provided that each of the following conditions
               --------------    --------
precedent is satisfied on or before March 28, 2001:

          (a)  The Agent has received from the Company and each of Banks a duly
executed original (or, if elected by the Agent, an executed facsimile copy) of
this Amendment, together with a duly executed Guarantor Acknowledgment and
Consent in the form attached hereto.

          (b)  The Agent has received from the Company for the ratable benefit
of the Banks an amendment fee in the amount of $100,000.

     5.  Reservation of Rights.  The Company acknowledges and agrees that the
         ---------------------
execution and delivery by the Agent and the Banks of this Amendment shall not be
deemed to create a course of dealing or otherwise obligate the Agent or the
Banks to enter into amendments under the same, similar, or any other
circumstances in the future.

                                      -4-
<PAGE>

     6.  Miscellaneous.
         -------------

          (a)  Except as herein expressly amended, all terms, covenants and
provisions of the Credit Agreement are and shall remain in full force and effect
and all references therein and in the other Loan Documents to such Credit
Agreement shall henceforth refer to the Credit Agreement as amended by this
Amendment.  This Amendment shall be deemed incorporated into, and a part of, the
Credit Agreement.  This Amendment is a Loan Document.

          (b)  This Amendment shall be binding upon and inure to the benefit of
the parties hereto and to the Credit Agreement and their respective successors
and assigns.  No third party beneficiaries are intended in connection with this
Amendment.

          (c)  This Amendment shall be governed by and construed in accordance
with the law of the State of California.

          (d)  This Amendment may be executed in any number of counterparts,
each of which shall be deemed an original, but all such counterparts together
shall constitute but one and the same instrument.  Each of the parties hereto
understands and agrees that this document (and any other document required
herein) may be delivered by any party thereto either in the form of an executed
original or an executed original sent by facsimile transmission to be followed
promptly by mailing of a hard copy original, and that receipt by the Agent of a
facsimile transmitted document purportedly bearing the signature of a Bank or
the Company shall bind such Bank or the Company, respectively, with the same
force and effect as the delivery of a hard copy original.  Any failure by the
Agent to receive the hard copy executed original of such document shall not
diminish the binding effect of receipt of the facsimile transmitted executed
original of such document of the party whose hard copy page was not received by
the Agent, and the Agent is hereby authorized to make sufficient photocopies
thereof to assemble complete counterparty documents.

          (e)  This Amendment, together with the Credit Agreement, contains the
entire and exclusive agreement of the parties hereto with reference to the
matters discussed herein and therein.  This Amendment supersedes all prior
drafts and communications with respect thereto.  This Amendment may not be
amended except in accordance with the provisions of Section 11.01 of the Credit
Agreement.

          (f)  If any term or provision of this Amendment shall be deemed
prohibited by or invalid under any applicable law, such provision shall be
invalidated without affecting the remaining provisions of this Amendment or the
Credit Agreement, respectively.

          (g)  The Company covenants to pay to or reimburse the Agent, upon
demand, for all reasonable costs and expenses (including reasonable Attorney
Costs) incurred in connection with the

                                      -5-
<PAGE>

development, preparation, negotiation, execution and delivery of this Amendment.

     IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Amendment as of the date first above written.

                                    WEST MARINE FINANCE COMPANY, INC.

                                    By /s/ Russell Solt
                                      ------------------------------------
                                      Russell Solt
                                      Senior Vice President and
                                      Chief Financial Officer

                                    BANK OF AMERICA, N.A., as Agent

                                    By /s/ Dora Brown
                                      ------------------------------------
                                      Dora Brown
                                      Vice President

                                    BANK OF AMERICA, N.A., as a Bank and an
                                    Issuing Bank

                                    By /s/ Lisa M. Thomas
                                      ------------------------------------
                                      Lisa M. Thomas
                                      Senior Vice President

                                    FLEET NATIONAL BANK, as a Bank

                                    By /s/ Jeff Kinney
                                      ------------------------------------
                                      Jeff Kinney
                                      Senior Vice President

                                    UNION BANK OF CALIFORNIA, N.A., as a Bank

                                    By /s/ James Goudy
                                      ------------------------------------
                                      James Goudy
                                      Vice President

                                      -6-
<PAGE>

                     GUARANTOR ACKNOWLEDGMENT AND CONSENT
                     ------------------------------------

     Each of the undersigned Guarantors hereby (i) acknowledges and consents to
the terms of and the execution, delivery and performance of the foregoing Third
Amendment to Credit Agreement (the "Amendment") (without implying the need for
                                    ---------
any such acknowledgement or consent), and (ii) represents and warrants to the
Agent and the Banks that, both before and after giving effect to the Amendment,
its respective Guaranty remains in full force and effect as an enforceable
obligation of the Guarantor, except as enforceability may be limited by
applicable bankruptcy, insolvency, or similar laws affecting the enforceability
of creditors' rights generally or by equitable principles relating to
enforceability, without defense, counterclaim or offset, and that it is in
compliance with all of its covenants contained therein.  Each Guarantor further
represents that the execution, delivery and performance by such Person of this
Acknowledgement and Consent have been duly authorized by all necessary
corporate, partnership and other action and do not and will not require any
registration with, consent or approval of, notice to or action by, any Person
(including any Governmental Authority) in order to be effective and enforceable.
Each Guarantor remakes as of the Effective Date (as defined in the Amendment)
all of the representations and warranties made by it pursuant to its respective
Guaranty.  Capitalized terms used herein and not otherwise defined have the
respective meanings defined in the Credit Agreement (as defined in the
Amendment).

  IN WITNESS WHEREOF, Russell Solt, as Senior Vice President and Chief Financial
Officer of each of the Guarantors, has executed this Acknowledgement and Consent
on each Guarantor as of this 28th day of March, 2001.

                              WEST MARINE, INC., a Delaware corporation

                              WEST MARINE PRODUCTS, INC., a California
                                corporation

                              E&B MARINE INC., a Delaware corporation

                              E&B MARINE SUPPLY, INC., a Maryland corporation

                              E&B MARINE SUPPLY, INC., a New Jersey corporation

                              E&B MARINE SUPPLY (Florida), Inc., a Delaware
                                corporation

                                      -7-
<PAGE>

                              GOLDBERGS' MARINE DISTRIBUTORS, INC., a Delaware
                                corporation

                              JAMES BLISS & CO., INC., a Massachusetts
                                corporation

                              SEA RANGER MARINE INC., a Delaware corporation

                              KRISTA CORPORATION, a Delaware corporation

                              CENTRAL MARINE SUPPLY, INC., a New Jersey
                                corporation

                              WEST MARINE LBC, INC., a California corporation

                              WEST MARINE IHC I, INC., a California corporation

                              WEST MARINE IHC II, INC., a California corporation

                              E&B MARINE LBC, INC., a California corporation

                              E&B MARINE IHC I, INC., a California corporation

                              E&B MARINE IHC II, INC., a California corporation

                              W MARINE MANAGEMENT COMPANY, INC., a California
                                corporation

                              WEST MARINE PUERTO RICO, INC., a California
                                corporation

                              By /s/ Russell Solt
                                 ------------------------------------
                                 Russell Solt
                                 Senior Vice President and Chief Financial
                                 Officer of each of the foregoing corporations

                                      -8-Exhibit 10.24

                    REGISTRATION RIGHTS AND VOTING AGREEMENT

     THIS AGREEMENT is made as of March 27, 2001, by and among UroMed
Corporation, a Massachusetts corporation ("UroMed") and the parent of
Providence Merger Corporation, a California corporation ("Merger Sub"), the
stockholders of SSGI, a California corporation (the "Company"), listed on the
signature pages attached hereto (the "Stockholders"), Philip Heintz, as
representative (the "Representative") of the Stockholders, and the Heintz
Family Trust - 1997, (the "Trust").

     This Agreement is made pursuant to an Agreement and Plan of Merger and
Reorganization, dated as of March 26, 2001 (the "Merger Agreement"), by and
among UroMed, Merger Sub, the Company, the Stockholders and the Trust,
whereunder Merger Sub will be merged with and into the Company, the separate
existence of Merger Sub will cease and the Company will continue in existence
as the surviving corporation in the merger. Except as otherwise defined herein,
the capitalized terms used in this Agreement shall have the meanings assigned
to such terms in the Merger Agreement.

     In order to induce the Stockholders and the Trust to enter into the Merger
Agreement and to consummate the transactions contemplated thereby, UroMed has
agreed to provide the registration rights set forth in this Agreement.

     The parties hereto agree as follows:

     1. Definitions.

     "Commission" means the Securities and Exchange Commission.

     "Common Stock" means the common stock, $0.01 par value per share, of
UroMed.

     "Company" has the meaning specified in the preamble.

     "Merger Agreement" has the meaning specified in the preamble.

     "Person" means an individual, partnership, corporation, association,
trust, joint venture, unincorporated organization, or any government,
governmental department or agency or political subdivision thereof.

     "Registrable Securities" means (a) any shares of Common Stock issued or
issuable under the Merger Agreement to (i) the Stockholders or the Trust in
exchange for the shares of common stock of the Company owned by the
Stockholders and (ii) to Lee L. Potts, Steven Awe, Brent Heintz and Mark Rollin
in exchange for the discharge of the Company's indebtedness to them, and (b)
any securities issued or issuable with respect to the securities referred to in
clause (a) by way of a stock dividend or stock split or in connection with a

<PAGE>

combination of shares, recapitalization, merger, consolidation or other
reorganization. As to any particular Registrable Securities, such securities
will cease to be Registrable Securities when they have been distributed to the
public through a broker, dealer or market purchaser in compliance with Rule 144
under the Securities Act (or any similar rule then in force) or sold pursuant
to an effective registration statement under the Securities Act.

     "Registration Expenses" has the meaning specified in ss.4.

     "Registration Statement" has the meaning specified in ss.2.

     "Securities Act" means the Securities Act of 1933, as amended, or any
successor federal statute, and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

     "Securities Exchange Act" means the Securities Exchange Act of 1934, as
amended, or any successor federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

     "Stockholders" has the meaning specified in the preamble.

     "Trust" has the meaning specified in the preamble.

     "UroMed" has the meaning specified in the preamble.

     2. Registration on Form S-3. Within sixty (60) days after the Closing (as
defined in the Merger Agreement), UroMed will prepare and file with the
Commission a registration statement on Form S-3 or other appropriate form
covering all of the Registrable Securities (the "Registration Statement"). The
Registration Statement will permit delayed or continuous offerings pursuant to
Rule 415 under the Securities Act.

     3. Registration Procedures.

     UroMed agrees to use commercially reasonable best efforts to effect the
registration of the Registrable Securities in accordance with the intended
method of disposition thereof, and pursuant thereto UroMed will as
expeditiously as possible:

         (a) use reasonable efforts to cause the Registration Statement to
     become effective (provided that before filing the Registration Statement
     or prospectus or any amendments or supplements thereto, UroMed will
     furnish to one counsel, selected by the Representative, copies of all such
     documents proposed to be filed, which documents will be subject to the
     timely review of such counsel);

         (b) prepare and file with the Commission such amendments and
     supplements to the Registration Statement and the prospectus used in
     connection therewith as may be necessary to keep such registration

<PAGE>

     statement effective until the earlier of one year after the filing date or
     such time as all of the Registrable Securities covered by such
     registration statement have been sold and to comply with the provisions of
     the Securities Act with respect to the disposition of all securities
     covered by the Registration Statement during such effective period in
     accordance with the intended methods of disposition by the sellers thereof
     set forth in the Registration Statement;

         (c) furnish to each seller of Registrable Securities such number of
     copies of the Registration Statement, each amendment and supplement
     thereto, the prospectus included in the Registration Statement (including
     each preliminary prospectus) and such other documents as each such seller
     may reasonably request in order to facilitate the disposition of the
     Registrable Securities owned by each such seller;

         (d) use commercially reasonable best efforts to register or qualify
     the Registrable Securities under such other securities or blue sky laws of
     such states of the United States as any seller reasonably requests and do
     any and all other acts and things which may be reasonably necessary or
     advisable to enable such seller to consummate the disposition in such
     jurisdictions of the Registrable Securities owned by such seller; provided
     that UroMed will not be required (i) to qualify generally to do business
     in any jurisdiction where it would not otherwise be required to qualify
     but for this subparagraph (d), (ii) to subject itself to taxation in any
     such jurisdiction or (iii) to consent to general service of process in any
     such jurisdiction;

         (e) notify each seller of the Registrable Securities, at any time when
     a prospectus relating thereto is required to be delivered under the
     Securities Act, of the happening of any event as a result of which the
     prospectus included in the Registration Statement contains an untrue
     statement of a material fact or omits any fact necessary to make the
     statements therein not misleading, and, at the request of any such seller,
     UroMed will promptly prepare (and, when completed, give notice to each
     seller of Registrable Securities) a supplement or amendment to such
     prospectus so that, as thereafter delivered to the purchasers of such
     Registrable Securities, such prospectus will not contain an untrue
     statement of a material fact or omit to state any fact necessary to make
     the statements therein not misleading; provided that upon such
     notification by UroMed, each seller of the Registrable Securities will not
     offer or sell Registrable Securities until UroMed has notified such seller
     that it has prepared a supplement or amendment to such prospectus and
     delivered copies of such supplement or amendment to such seller;

         (f) cause all the Registrable Securities to be listed on each
     securities exchange on which similar securities issued by UroMed are then
     listed;

         (g) in the event of the issuance of any stop order suspending the
     effectiveness of the Registration Statement, or of any order suspending or
     preventing the use of any related prospectus or suspending the
     qualification of any Registrable Securities included in the Registration
     Statement for sale in any jurisdiction, UroMed will use commercially
     reasonable best efforts promptly to obtain the withdrawal of such order.

<PAGE>

     4. Registration Expenses.

     All expenses incident to UroMed's performance of or compliance with this
Agreement, including without limitation all registration and filing fees, fees
and expenses of compliance with securities or blue sky laws, printing expenses,
messenger and delivery expenses, and fees and disbursements of counsel for
UroMed and all independent certified public accountants and other Persons
retained by UroMed, UroMed's internal expenses (including, without limitation,
all salaries and expenses of its officers and employees performing legal or
accounting duties), the expense of any annual audit or quarterly review, the
expense of any liability insurance for UroMed and its board of directors and
the expenses and fees for listing the securities to be registered on each
securities exchange on which similar securities issued by UroMed are then
listed (all such expenses being herein called "Registration Expenses"), will be
borne by UroMed.

     5. Indemnification.

     (a) UroMed agrees to indemnify, protect, defend and hold harmless, to the
extent permitted by law, each holder of Registrable Securities, its officers
and directors and each Person who controls such holder (within the meaning of
the Securities Act) against all losses, claims, damages and liabilities caused
by any untrue or alleged untrue statement of material fact contained in the
Registration Statement, prospectus or preliminary prospectus or any amendment
thereof or supplement thereto or any omission or alleged omission of a material
fact required to be stated therein or necessary to make the statements therein
not misleading, except insofar as the same are (i) caused by or contained in
any information furnished to UroMed by such holder for use therein, (ii) caused
by such holder's failure to deliver a copy of the Registration Statement or
prospectus or any amendments or supplements thereto after UroMed has furnished
such holder with a sufficient number of copies of the same, or (iii) caused by
such holder's sale of Registrable Securities in violation of the proviso to
Section 3(e) hereof.

     (b) In connection with the Registration Statement, each holder of
Registrable Securities will furnish to UroMed in writing such information and
affidavits as UroMed reasonably requests for use in connection with any such
registration statement or prospectus and, to the extent permitted by law, will
indemnify UroMed, its directors and officers and each Person who controls
UroMed (within the meaning of the Securities Act) against any losses, claims,
damages and liabilities resulting from any untrue or alleged untrue statement
of material fact contained in the Registration Statement, prospectus or
preliminary prospectus or any amendment thereof or supplement thereto or any
omission or alleged omission of a material fact required to be stated therein
or necessary to make the statements therein not misleading.

     (c) Any Person entitled to indemnification hereunder will (i) give prompt
written notice to the indemnifying party of any claim with respect to which it
seeks indemnification and (ii) unless in such indemnified party's reasonable
judgment a conflict of interest between such indemnified and indemnifying
parties may exist with respect to such claim, permit such indemnifying party to

<PAGE>

assume the defense of such claim with counsel reasonably satisfactory to the
indemnified party. If such defense is assumed, the indemnifying party will not
be subject to any liability for any settlement made by the indemnified party
without its consent (but such consent will not be unreasonably withheld). An
indemnifying party who is not entitled to, or elects not to, assume the defense
of a claim will not be obligated to pay the fees and expenses of more than one
counsel for all parties indemnified by such indemnifying party with respect to
such claim, unless in the reasonable judgment of any indemnified party a
conflict of interest may exist between such indemnified party and any other of
such indemnified parties with respect to such claim. Subject to the foregoing
terms and provisions of this ss.5(c), each indemnifying party hereunder will
reimburse the person entitled to indemnification hereunder for all legal and
other expenses reasonably incurred in connection with investigating and
defending the action or claim for which such indemnified party seeks
indemnification, as such expenses are incurred.

     (d) The indemnification provided for under this Agreement will remain in
full force and effect regardless of any investigation made by or on behalf of
the indemnified party or any officer, director or controlling Person of such
indemnified party and will survive the transfer of securities.

     6. Voting; Board of Directors.

     (a) Each of Philip Heintz, Lillian Heintz and the Trust agree that in
connection with any vote of the stockholders of UroMed that each shall vote all
Registrable Securities held by him, her, or it (and to cause any Registrable
Securities held by his, her or its Affiliates to be voted), either (i) in
accordance with the recommendation of UroMed's Board of Directors or (ii) in
the same proportion as UroMed's unaffiliated holders of common stock, with
UroMed's Board of Directors having the right from time to time to elect between
(i) and (ii) above; provided, that such restriction upon each of Mr. Heintz,
Ms. Heintz and the Trust shall terminate upon Mr. Heintz's removal from
UroMed's board of directors pursuant to Section 6(b) below (but shall not
terminate upon Mr. Heintz's voluntary resignation from UroMed's board of
directors). In the event either Mr. Heintz, Ms. Heintz or the Trust transfer
any of the common stock held by them to an Affiliate, other than pursuant to
Rule 144 or a registration statement, each will cause such Affiliate to agree
in writing to be bound by this Section 6. Each of Mr. Heintz, Ms. Heintz and
the Trust agree that each of their shares may contain a legend referencing this
Section 6.

     (b) Philip Heintz's acknowledges and agrees that he may be removed from
UroMed's board of directors, with or without cause, upon a request for removal
by a majority of the board of directors in effect at such time and upon such
request, he shall immediately resign from UroMed's board of directors.

     7. Lock Up.

     Each Stockholder and the Trust agreenot to effect (and to cause its
Affiliates not to effect) any sale, distribution, pledge or other transfer of
any kind (including any "hedging" or other transaction intended to shift or
limit risk of ownership) of Registrable Securities (or any interest therein),

<PAGE>

including a sale pursuant to Rule 144 (or any similar provision then in force)
under the Securities Act, during the 120-day period beginning on date hereof.
Philip Heintz, Lillian Heintz and the Trust each further agree not to sell,
distribute, pledge or otherwise transfer more than twenty-five percent (25%) of
the Registrable Securities held by him, her it, as applicable, them in any
twelve month period and in the case of Mr. Heintz, hereby acknowledges , agrees
that he is subject to and shall abide by the UroMed policies governing sales of
UroMed Common Stock by UroMed officers and directors.

     Notwithstanding the above, each of the Stockholders and the Trust shall be
permitted, during the 120-day period beginning on date hereof, to transfer the
Registrable Securities to a newly formed entity, with such transfer subject to
the prior approval of UroMed.

     8. Miscellaneous.

     (a) No Inconsistent Agreements. UroMed will not hereafter enter into any
agreement with respect to its securities which is inconsistent with the rights
granted to the holders of Registrable Securities under this Agreement.

     (b) Adjustments Affecting Registrable Securities. UroMed will not take any
action, or permit any change to occur, with respect to its securities which
would materially and adversely affect the ability of the holders of Registrable
Securities to include such Registrable Securities in a registration undertaken
pursuant to this Agreement or which would materially and adversely affect the
marketability of such Registrable Securities.

     (c) Remedies. Except as otherwise expressly provided herein, nothing
herein expressed or implied is intended or shall be construed to confer upon or
to give any Person, other than the parties hereto and their respective
shareholders, any rights or remedies under or by reason of this Agreement.

     (d) Amendments and Waivers. Except as otherwise provided herein, the
provisions of this Agreement may be amended or waived only upon the prior
written consent of UroMed and the Representative (if, and only to the extent
that, the rights and obligations of such parties hereto are adversely
affected).

     (e) Successors and Assigns. This Agreement shall be binding upon and inure
to the benefit of the parties hereto and their respective heirs, successors and
permitted assigns. Neither this Agreement nor the obligations of any party
hereunder shall be assignable or transferable by such party without the prior
written consent of the other parties hereto. In addition, whether or not any
express assignment has been made, the provisions of this Agreement which are
for the benefit of purchasers or holders of Registrable Securities are also for
the benefit of, and enforceable by, any subsequent holder of Registrable
Securities.

     (f) Severability. In the event that any covenant, condition, or other
provision herein contained is held to be invalid, void, or illegal by any court

<PAGE>

of competent jurisdiction, the same shall be deemed to be severable from the
remainder of this Agreement and shall in no way affect, impair, or invalidate
any other covenant, condition, or other provision contained herein.

     (g) Counterparts. This Agreement may be executed in multiple counterparts,
each of which shall be deemed an original, but all of which together shall
constitute one and the same instrument.

     (h) Sections and Section Headings. The headings of sections and
subsections are for reference only and shall not limit or control the meaning
thereof.

     (i) Governing Law. This Agreement shall be construed and enforced in
accordance with, and rights of the parties shall be governed by, the internal
laws of the Commonwealth of Massachusetts (without reference to principles of
conflicts or choice of law that would cause the application of the internal
laws of any other jurisdiction).

     (j) Submission to Jurisdiction; Waivers. Each of the parties hereto, for
itself and on behalf of its successors, assigns and transferees, hereby
irrevocably and unconditionally:

         (i) submits for itself and its property in any legal action or
proceeding relating to this Agreement or for recognition and enforcement of any
judgment in respect thereof, to the exclusive general jurisdiction of the
courts of the Commonwealth of Massachusetts, the courts of the United States of
America for the District of Massachusetts, and appellate courts from any
thereof;

         (ii) consents that any such action or proceeding may be brought in
such courts, and waives any objection that it may now or hereafter have to the
venue of any such action or proceeding in any such court or that such action or
proceeding was brought in an inconvenient court and agrees not to plead or
claim the same;

         (iii) agrees that service of process in any such action or proceeding
may be effected by mailing a copy thereof by registered or certified mail (or
any substantially similar form of mail), postage prepaid, at its address as
provided in clause (k) hereof or at such other address as it shall have
notified each of the other parties hereto in the manner provided in clause (k)
hereof;

         (iv) agrees that nothing herein shall affect the right to effect
service of process in any other manner permitted by law; and

         (v) waives trial by jury in any legal action or proceeding relating to
this Agreement and for any counterclaim therein.

<PAGE>

     (k) Arbitration.

         (i) All disputes or claims arising under or in any way relating to
this Agreement shall be settled by arbitration before a panel of three
arbitrators (with one designated by UroMed and one designated by the
Stockholders and the Trust, and the third arbitrator designated by the first
two) pursuant to the rules of the American Arbitration Association. Any
arbitrator designated by UroMed or the Stockholders and the Trust must be an
"Independent Person." For the purposes of this Section 8(k), an "Independent
Person" shall be an individual who is not and has not been (i) a director,
officer, employee, agent or shareholder of any party hereto, (ii) a consultant
to any party hereto, (iii) a person with a direct or indirect financial
interest in any contract with any party hereto, (iv) a director, officer or key
employee of a company at a time when such company was party to a contract with
any party hereto, or (v) a relative of any person referred to in clauses (i),
(ii), (iii) or (iv) above. As used in the immediately preceding sentence, the
term "any party hereto" shall be deemed to include any affiliates of the
parties hereto. Any such arbitration shall take place in Boston, Massachusetts.
Arbitration may be commenced at any time by UroMed or the Stockholders or the
Trust giving written notice to the other party hereto that such dispute has
been referred to arbitration under this Section 8(k). The third arbitrator
shall be selected as prescribed above, but if the first two arbitrators do not
so agree within 30 days after the date of the notice referred to above, the
selection shall be made pursuant to the rules of the American Arbitration
Association from the Commercial Arbitration Panel maintained by such
Association. Any award rendered by the arbitrators shall be conclusive and
binding upon the parties hereto; provided, however, that any such award shall
be accompanied by a written opinion of the arbitrators giving the reasons for
the award. In making such award, the arbitrators shall be authorized to award
interest on any amount awarded. This provision for arbitration shall be
specifically enforceable by the Stockholders, the Trust and UroMed and the
decision of the arbitrators in accordance herewith shall be final and binding
and there shall be no right of appeal therefrom. Each of the Stockholders, the
Trust and UroMed shall pay its own expenses of arbitration and the expenses of
the arbitrators shall be equally shared; provided, however, that if in the
opinion of the arbitrators any claim for indemnification or any defense or
objection thereto was frivolous or in bad faith, the arbitrators may assess, as
part of the award, all or any part of the arbitration expenses of the other
party (including reasonable attorneys' fees) and of the arbitrators against the
party raising such unreasonable claim, defense or objection.

         (ii) To the extent that arbitration may not be legally permitted
hereunder and the Stockholders, the Trust and UroMed do not at the time of such
dispute or claim mutually agree to submit such dispute or claim to arbitration
either the Stockholders, or the Trust or UroMed may commence a civil action in
a court of appropriate jurisdiction to resolve disputes or claims hereunder.
Nothing contained in this Section 8(k) shall prevent the Stockholders, the
Trust and UroMed from settling any dispute or claim by mutual agreement at any
time.

         (iii) Neither the Stockholders, nor the Trust, nor UroMed shall be
precluded hereby from seeking, from the courts of any jurisdiction, provisional
or equitable remedies of a type not available in arbitration, including without
limitation, temporary restraining orders and preliminary or permanent
injunctions, nor shall the pursuit of such provisional or equitable relief

<PAGE>

constitute a waiver or modification of such party's right and obligation to
arbitrate any related or unrelated dispute which is otherwise subject to
arbitration under this Agreement, unless such waiver is expressed in writing
and signed by such party. In the event any person not a party to this Agreement
shall commence any interpleader or similar action which either directly or
indirectly raises issues which are subject to arbitration hereunder, the
Stockholders, the Trust and UroMed shall seek a stay of such proceedings
pending arbitration in accordance with this Agreement.

     (l) Notices. All notices, demands and other communications hereunder shall
be in writing or by written telecommunication, and shall be deemed to have been
duly given if delivered personally or if mailed by certified mail, return
receipt requested, postage prepaid, or if sent by overnight courier, or sent by
written telecommunication, as follows:

     If to UroMed:

           UroMed Corporation
           1400 Providence Highway
           Norwood, Massachusetts 02062
           Attention:   Daniel Muscatello
                        President and CEO

           With a copy to:

           John R. Utzschneider, Esq.
           Bingham Dana LLP
           150 Federal Street
           Boston, Massachusetts 02110

     If to the Representative:

           c/o SSGI
           1370 Ridgewood Drive, Suite 20
           Chico, California  95973

           With a copy to:

           W. Stephen Wilson, Esq.
           Tobin & Tobin, P.C.
           500 Sansome Street, 8th Floor
           San Francisco, California 94111-3211

     Any such notice shall be effective (a) if delivered personally, when
received, (b) if sent by overnight courier, when receipted for, (c) if mailed,
three (3) days after being mailed as described above, and (d) if sent by
written telecommunication, when dispatched.

<PAGE>

     (m) Entire Agreement. This Agreement contains the entire understanding of
the parties, supersedes all prior agreements and understandings relating to the
subject matter hereof.

     (n) Further Assurances. The parties agree to take such reasonable steps
and execute such other and further documents as may be necessary or appropriate
to cause the terms and conditions contained herein to be carried into effect.

     (o) Public Statements or Releases. Each of the parties hereto agrees that
prior to the consummation of the Closing no party to this Agreement will make,
issue or release any public announcement, statement or acknowledgment of the
existence of, or reveal the status of, this Agreement or the transactions
provided for herein, without first obtaining the consent of the other party
hereto. Nothing contained in this Section clause (n) shall prevent either party
from making such disclosures as such party may consider necessary to satisfy
such party's legal or contractual obligations.

                  [Remainder of Page Intentionally Left Blank]

<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this Registration
Rights Agreement as of the date first above written.

                           UROMED CORPORATION

                           By:  /s/ Daniel Muscatello
                               Daniel Muscatello
                               President and CEO

                           REPRESENTATIVE:

                           /s/ Philip Heintz
                           Philip Heintz

                           STOCKHOLDERS:

                           /s/ Philip Heintz
                           Philip Heintz

                           /s/ Lillian Heintz
                           Lillian Heintz

                           TRUST:

                           HEINTZ FAMILY TRUST - 1997

                           By: /s/ Philip T. Heintz
                               Philip T. Heintz

                           By: /s/ Lillian Heintz
                               Lillian Heintz

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