1 EXHIBIT 10.4 STOCKHOLDER AGREEMENT (INTERPORE) STOCKHOLDER AGREEMENT dated as of February 11, 1998, among CROSS MEDICAL PRODUCTS, INC., a Delaware corporation ("Cross"), and the individuals and other parties listed on Schedule A attached hereto (each, a "Stockholder" and, collectively, the "Stockholders"). WHEREAS, Interpore International, a California corporation ("Interpore"), Buckeye International, Inc., a Delaware corporation and a wholly owned subsidiary of Interpore ("Sub"), and Cross propose to enter into an Agreement and Plan of Merger dated as of the date hereof (as the same may be amended or supplemented, the "Merger Agreement"; capitalized terms used but not defined herein shall have the meanings set forth in the Merger Agreement) providing for the merger of Sub with and into Cross (the "Merger"), upon the terms and subject to the conditions set forth in the Merger Agreement; and WHEREAS, each Stockholder owns the number of shares of common stock, no par value per share, of Interpore (the "Common Stock"), set forth opposite his or its name on Schedule A attached hereto (such shares of Common Stock, together with any other shares of capital stock of Interpore acquired by such Stockholder after the date hereof and during the term of this Agreement (including through the exercise of any stock options, warrants or similar instruments), being collectively referred to herein as the "Subject Shares"); and WHEREAS, as a condition to its willingness to enter into the Merger Agreement, Cross has requested that each Stockholder enter into this Agreement; NOW, THEREFORE, to induce Cross to enter into, and in consideration of its entering into, the Merger Agreement, and in consideration of the promises and the representations, warranties and agreements contained herein, the parties agree as follows: 1. Representations and Warranties of each Stockholder. Each Stockholder hereby, severally and not jointly, represents and warrants to Cross as of the date hereof in respect of himself or itself as follows: (a) Authority. The Stockholder has all requisite power and authority to enter into this Agreement and to consummate the transactions contemplated hereby. This Agreement has been duly authorized, executed and delivered by the Stockholder and constitutes a valid and binding obligation of the Stockholder enforceable against the Stockholder in accordance with its terms. Except for the expiration or termination of the waiting periods under the HSR Act and informational filings with the SEC, the execution and delivery of this Agreement do not, and the consummation of the transactions contemplated hereby and compliance with the terms hereof will not, (i) conflict with, or result in any violation of, or default (with or without notice or lapse of time or both) under any provision of the articles of incorporation or by-laws (if any) of the Stockholder, any trust agreement, loan or credit agreement, note, bond, mortgage, indenture, lease or other agreement, instrument, permit, concession, franchise, license, judgment, order, notice, decree, statute, law, ordinance, rule or regulation applicable to the Stockholder or to the 8 2 Stockholder's property or assets, (ii) require any filing with, or permit, authorization, consent or approval of, any Federal, state or local government or any court, tribunal, administrative agency or commission or other governmental or regulatory authority or agency, domestic, foreign or supranational or (iii) violate any order, writ, injunction, decree, statute, rule or regulation applicable to the Stockholder or any of the Stockholder's properties or assets, including the Subject Shares. If the Stockholder is a natural person and is married, and the Stockholder's Subject Shares constitute community property or otherwise need spousal or other approval for this Agreement to be legal, valid and binding, this Agreement has been duly authorized, executed and delivered by, and constitutes a valid and binding agreement of, the Stockholder's spouse, enforceable against such spouse in accordance with its terms. No trust of which such Stockholder is a trustee requires the consent of any beneficiary to the execution and delivery of this Agreement or to the consummation of the transactions contemplated hereby. (b) The Subject Shares. The Stockholder is the record and beneficial owner of, or is trustee of a trust that is the record holder of, and whose beneficiaries are the beneficial owners of, or is the beneficial owner of, and is the owner of a sole proprietorship that is the record holder of, and has good and valid title to, the Subject Shares set forth opposite his or its name on Schedule A attached hereto, free and clear of any Liens whatsoever except as shown on Schedule A which impose no restrictions on the Stockholder's right to vote the Subject Shares. The Stockholder does not own, of record or beneficially, any shares of capital stock of Interpore other than the Subject Shares set forth opposite his or its name on Schedule A attached hereto. The Stockholder has the sole right to vote such Subject Shares, and none of such Subject Shares is subject to any voting trust or other agreement, arrangement or restriction with respect to the voting of such Subject Shares, except as contemplated by this Agreement. The Stockholder represents that any proxies heretofore given in respect of the Stockholder's Subject Shares are not irrevocable, and that all such proxies are hereby revoked. 2. Representations and Warranties of Cross. Cross hereby represents and warrants to each Stockholder that Cross has all requisite corporate power and authority to enter into this Agreement and to consummate the transactions contemplated hereby. This Agreement has been duly authorized, executed and delivered by Cross and constitutes a valid and binding obligation of Cross enforceable against Cross in accordance with its terms. 3. Covenants of each Stockholder. Until the termination of this Agreement in accordance with Section 8, each Stockholder, severally and not jointly, agrees as follows: (a) At any meeting of stockholders of Interpore called to vote upon the Merger and the Merger Agreement or at any annual meeting at which such matters are voted upon, and at any adjournment thereof or in any other circumstances upon which a vote, consent or other approval with respect to the Merger and the Merger Agreement is sought, the Stockholder shall vote (or cause to be voted) the Subject Shares in favor of the Merger, the adoption by Interpore of the Merger Agreement and the approval of the terms thereof and each of the other transactions contemplated by the Merger Agreement. (b) The Stockholder shall not, nor shall it permit any director, officer, partner, employee or agent or any investment banker, attorney or other adviser or representative 2 3 of the Stockholder to, directly or indirectly, except as contemplated by this Agreement, directly or indirectly, grant any proxies or powers of attorney with respect to the Subject Shares, deposit the Subject Shares into a voting trust, enter into a voting agreement with respect to the Subject Shares, dispose of any Subject Shares or permit the Subject Shares to be encumbered by or subject to any security interest, lien, claim, pledge, option, agreement, limitation in voting rights, charge or other encumbrance of any nature. (c) Subject to the terms of Section 12, during the term of this Agreement, the Stockholder shall not, nor shall it permit any director, officer, partner, employee or agent or any investment banker, attorney or other adviser or representative of the Stockholder to, directly or indirectly, (i) solicit, initiate or encourage the submission of, any merger agreement or merger (other than the Merger Agreement and the Merger), consolidation, combination, sale of substantial assets, reorganization, recapitalization, dissolution, liquidation or winding up of or by Interpore or any other Alternative Transaction as such term is defined in Section 7.3(e) of the Merger Agreement (a "Competing Proposal") or (ii) participate in any discussions or negotiations regarding, or furnish to any person any information with respect to, or take any other action to facilitate any inquiries or the making of any proposal that constitutes, or may reasonably be expected to lead to, any Competing Proposal. Without limiting the foregoing, it is understood that any violation of the restrictions set forth in the preceding sentence by an investment banker or attorney retained by, or other adviser or representative of, such Stockholder, whether or not such person is purporting to act on behalf of such Stockholder, shall be deemed to be a violation of this Section 3(c) by such Stockholder. (d) Until the Merger is consummated or the Merger Agreement is terminated, the Stockholder shall use all reasonable efforts to take, or cause to be taken, all actions, and to do, or cause to be done, and to assist and cooperate with the other parties in doing, all things necessary, proper or advisable to consummate and make effective, in the most expeditious manner practicable, the Merger and the other transactions contemplated by the Merger Agreement. (e) The Stockholder, and any beneficiary of a revocable trust for which such Stockholder serves as trustee, shall not take any action to revoke or terminate such trust or take any other action which would restrict, limit or frustrate in any way the transactions contemplated by this Agreement. Each such beneficiary hereby acknowledges and agrees to be bound by the terms of this Agreement applicable to it. 4. Grant of Irrevocable Proxy; Appointment of Proxy. (a) Each Stockholder hereby irrevocably grants to, and appoints Joseph A. Mussey and Paul A. Miller, in their respective capacities as officers of Cross, and any individual who shall hereafter succeed to their respective offices of Cross, and each of them individually, such Stockholder's proxy and attorney-in-fact (with full power of substitution), for and in the name, place and stead of such Stockholder, to vote such Stockholder's Subject Shares, or grant a consent or approval in respect of such Subject Shares, in favor of adoption of the Merger Agreement and the related transactions contemplated by the Merger Agreement. 3 4 (b) Such Stockholder represents that any proxies heretofore given in respect of such Stockholder's Subject Shares are not irrevocable, and that all such proxies are hereby revoked. (c) Such Stockholder hereby affirms that the irrevocable proxy set forth in this Section 4 is given in connection with the execution of the Merger Agreement, and that such irrevocable proxy is given to secure the performance of the duties of the Stockholder under this Agreement. Such Stockholder hereby further affirms that the irrevocable proxy is coupled with an interest, and may under no circumstances be revoked. Such Stockholder hereby ratifies and confirms all that such irrevocable proxy may lawfully do or cause to be done by virtue hereof. Such irrevocable proxy is executed and intended to be irrevocable in accordance with the provisions of Section 212(e) of the Delaware General Corporation Law (the "DGCL"). 5. Further Assurances. Each Stockholder will, from time to time, execute and deliver, or cause to be executed and delivered, such additional or further consents, documents and other instruments as Cross may reasonably request for the purpose of effectively carrying out the transactions contemplated by this Agreement. 6. Certain Events. (a) Each Stockholder agrees that this Agreement and the obligations hereunder shall attach to such Stockholder's Subject Shares and shall be binding upon any person or entity to which legal or beneficial ownership of such Subject Shares shall pass, whether by operation of law or otherwise, including such Stockholder's heirs, guardians, administrators or successors. In the event of any stock split, stock dividend, merger, reorganization, recapitalization or other change in the capital structure of Interpore affecting the Common Stock, or the acquisition of additional shares of Common Stock or other voting securities of Interpore by any Stockholder, the number of Subject Shares listed in Schedule A beside the name of such Stockholder shall be adjusted appropriately and this Agreement and the obligations hereunder shall attach to any additional shares of Common Stock or other voting securities of Interpore issued to or acquired by such Stockholder. (b) Each Stockholder agrees that such Stockholder will tender to Interpore, within 10 business days after the date hereof (or, in the event Subject Shares are acquired subsequent to the date hereof within 10 business days after the date of acquisition), any and all certificates representing such Stockholder's Subject Shares in order that Interpore may inscribe upon such certificates the legend in accordance with Section 5.15 of the Merger Agreement. 7. Assignment. Neither this Agreement nor any of the rights, interests or obligations hereunder shall be assigned by any Stockholder, on the one hand, without the prior written consent of Cross nor by Cross, on the other hand, without the prior written consent of the Stockholders, except that Cross may assign, in its sole discretion, any or all of its rights, interests and obligations hereunder to any direct or indirect wholly owned subsidiary of Cross. Subject to the preceding sentence, this Agreement will be binding upon, inure to the benefit of and be enforceable by the parties and their respective successors and assigns. 4 5 8. Termination. This Agreement shall terminate on the earlier of (i) the Effective Time or (ii) the date upon which the Merger Agreement is terminated in accordance with its terms. 9. General Provisions. (a) Amendments. This Agreement may not be amended except by an instrument in writing signed by each of the parties hereto. (b) Notice. All notices and other communications hereunder shall be in writing and shall be deemed given if delivered personally or sent by overnight courier (providing proof of delivery) to Cross in accordance with Section 8.2 of the Merger Agreement and to the Stockholders at their respective addresses set forth on Schedule A attached hereto (or at such other address for a party as shall be specified in like notice). (c) Interpretation. When a reference is made in this Agreement to Sections, such reference shall be to a Section to this Agreement unless otherwise indicated. The headings contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. Wherever the words "include," "includes" or "including" are used in this Agreement, they shall be deemed to be followed by the words "without limitation." (d) Counterparts. This Agreement may be executed in one or more counterparts, all of which shall be considered one and the same agreement, and shall become effective when one or more of the counterparts have been signed by each of the parties and delivered to the other party, it being understood that each party need not sign the same counterpart. (e) Entire Agreement; No Third-Party Beneficiaries. This Agreement (including the documents and instruments referred to herein) (i) constitutes the entire agreement and supersedes all prior agreements and understandings, both written and oral, among the parties with respect to the subject matter hereof and (ii) is not intended to confer upon any person other than the parties hereto any rights or remedies hereunder. (f) Governing Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of Delaware regardless of the laws that might otherwise govern under applicable principles of conflicts of law thereof. (g) Voidability. If prior to the execution hereof, the Board of Directors of Interpore shall not have duly and validly authorized and approved by all necessary corporate action, this Agreement, the Merger Agreement and the transactions contemplated hereby and thereby, so that by the execution and delivery hereof Cross would become, or could reasonably be expected to become an "interested stockholder" with whom Cross would be prevented for any period pursuant to Section 203 of the DGCL from engaging in any "business combination" (as such terms are defined in Section 203 of the DGCL), then this Agreement shall be void and 5 6 unenforceable until such time as such authorization and approval shall have been duly and validly obtained. 10. Enforceable. The parties agree that irreparable damage would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to an injunction or injunctions to prevent breaches of this Agreement and to enforce specifically the terms and provisions of this Agreement in any court of the United States located in the State of Delaware or in a Delaware state court, this being in addition to any other remedy to which they are entitled at law or in equity. In addition, each of the parties hereto (i) consents to submit such party to the personal jurisdiction of any court of the United States located in the State of Delaware or any Delaware state court in the event any dispute arises out of this Agreement or any of the transactions contemplated hereby, (ii) agrees that such party will not attempt to deny or defeat such personal jurisdiction by motion or other request for leave from any such court and (iii) agrees that such party will not bring any action relating to this Agreement or the transactions contemplated hereby in any court other than a court of the United States located in the State of Delaware or a Delaware state court. 11. Public Announcements. No Stockholder shall issue any press release or other public statement with respect to the transactions contemplated by this Agreement and the Merger Agreement without the prior written consent of Interpore. 12. Stockholder Capacity. No person executing this Agreement who is or becomes during the term hereof a director or officer of Interpore makes any agreement or understanding herein in his or her capacity as such director or officer. Without limiting the generality of the foregoing, each Stockholder signs solely in his or her capacity as the record holder and beneficial owner of, or the trustee of a trust whose beneficiaries are the beneficial owners of, or as the beneficial owner of, and as the owner of a sole proprietorship that is the record holder of, such Stockholder's Subject Shares and nothing herein shall limit or affect any actions taken by a Stockholder in his or her capacity as an officer or director of Interpore in exercising its rights under the Merger Agreement. 13. Severability. If any term or other provision of this Agreement is invalid, illegal or incapable of being enforced by any rule or law or public policy, all other conditions and provisions of this Agreement shall nevertheless remain in full force and effect. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the parties hereto shall negotiate in good faith to modify this Agreement so as to effect the original intent of the parties as closely as possible to the fullest extent permitted by applicable law in an acceptable manner to the end that the transactions contemplated hereby are fulfilled to the extent possible. 6 7 IN WITNESS WHEREOF, Cross has caused this Agreement to be signed by its officer thereunto duly authorized and each Stockholder has signed this Agreement, all as of the date first written above. CROSS MEDICAL PRODUCTS, INC., A DELAWARE CORPORATION By: /S/ JOSEPH A. MUSSEY ------------------------------------------- Name: Joseph A. Mussey Title: President and Chief Executive Officer /S/ DAVID C. MERCER ---------------------------------------------- David C. Mercer, an Individual BURR, EGAN DELEAGE & CO. By: /S/ GUY P. NOHRA ------------------------------------------- Name: Guy P. Nohra ----------------------------------------- Title: General Partner ---------------------------------------