system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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name or logo, and the registered symbols and trademarks of the other party (the "Trademarks") only for the purposes set forth in this Agreement. Neither party will use the other's Trademarks without obtaining the prior approval of the other party. Any materials using Trademarks which are submitted to one party by the other are deemed to be approved if the receiving party has not disapproved the material in writing within ten (10) business days after it receives a request for approval. The parties shall not unreasonably disapprove any material. If any material is disapproved by one party, it will advise the other of the specific reasons for the disapproval. Once materials are approved by one party, the other party may make multiple uses of those approved materials and any images, likenesses, and photographs contained therein in the same or substantially similar media without seeking the other party's further approval. The approval by a party to use its registered symbols or trademarks does not convey any rights, title or interest to the other party in and to such registered symbols and trademarks. The party receiving permission to use a registered symbol or trademark will (i) follow all reasonable instructions from the owner regarding that symbol or trademark; and (ii) take all reasonable steps to protect it, including, when appropriate, using the symbols "®" or "™". The rights granted under this Section 6 cease upon the expiration or termination of this Agreement. 7. Confidentiality It is recognized that Torvec is a public company and as such, will file this Agreement with the United States Securities and Exchange Commission in accordance with rules and regulations promulgated by the Commission. It is also recognized that Torvec is entering into this Agreement in order to promote the aftermarket sale of its IsoTorque differential and to that end, either party may issue press and other informational releases, announcements, promotional programs, packages and materials relating to the subject matter of this Agreement without the other party's approval, provided that both parties shall have the right to comment upon and offer suggestions with respect to such releases, programs, etc. prior to their actual release. 8. Insurance Vendor shall maintain insurance for not less than the following limits and coverage with duly licensed insurance companies having an A.M. Best rating of A-, X or better. In addition to covering all of the normal operations of Vendor, this insurance shall cover all of the activities and events described under this Agreement. 9. Representations Vendor represents and warrants to Torvec the following: (i) it has the authority to enter into this Agreement and to perform hereunder in accordance with its provisions; (ii) no other person or entity has the right to be the exclusive automotive sponsor of the activities and the events set forth in this Agreement; and (iii) it will perform its obligations under this Agreement in compliance with all applicable laws, rules and regulations. 10. Notices All notices provided herein shall be in writing and are effective upon receipt if hand delivered, sent by overnight courier (with ability to confirm receipt), by fax or by registered or certified mail, return receipt requested, addressed to the respective parties hereto as follows: Either party may change its address for notice by giving written notice to the other party. 11. Amendments This Agreement shall not be altered or amended, nor any rights hereunder waived, except by written agreement between both parties. No waiver of any term, provision or condition of this Agreement, in any one or more instances, shall be deemed to be or construed as a further or continuing waiver of any other term, provision or condition. 12. Assignment Neither party may assign its rights or powers under this Agreement without the express written consent of the other, which consent shall • General Liability: Vendor shall maintain commercial general liability (CGL) insurance with a limit of not less than $1 million each occurrence. CGL coverages shall be written on ISO occurrence form CG 00 01 or a substitute form providing equivalent coverage and shall cover liabilities arising from events, premises, operations, independent contractors, products-completed operations, personal injury and advertising injury, and liability assumed under an insured contract. Subaru of America, Inc., its parent and subsidiaries shall be included as additional insureds under the CGL using ISO additional insured endorsement CG 20 10 or a substitute providing equivalent coverage. If to Vendor(s): If to Torvec: Phoenix Performance, LLC Torvec, Inc.. 481 Schuylkill Road 1999 Mt Read Blvd Phoenixville, PA 19460 Building 3
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Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.