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:
"""
terms to be agreed by the Party B and the Joint Venture Company. Article 44 Page 11 Party A and Party B shall sign the Contract for Technology Investment simultaneously with the signature of this Contract, and pursuant to the Technical Service Contract shall provide technical services to the Joint Venture Company, which shall reimburse to Party B the direct expenses incurred in China for those Party B personnel rendering such services. The form of the Contract for Technology Investment is attached hereto as Appendix 2. Article 45 The parties to this Contract agree that the technology, documentation and know-how provided under the Contract for Technology Investment and the technical services provided under the Contract for Technology Investment are provided for the use of the Joint Venture Company. Party A hereby undertakes to Party B and the Joint Venture Company that: (1) Party A and its Affiliates shall not at any time during or after the Contract Term use such technology and know-how except for the purpose of marketing and selling batteries produced by the Joint Venture Company; (2) In respect of such technology and know-how, Party A and its Affiliates shall comply with the confidentiality obligations set forth in Chapter 17 of this Contact; and (3) Breach of this Article by Party A shall be deemed to be a material breach of this Contract. Article 46 Party B and its Affiliates guarantee that following the Effective Date of this Contract, it will not further transfer to any Third Party: i) the proprietary technology for production of Powder (as defined below) to be made into Batteries (as defined below) or ii) the proprietary technology for production of Batteries that use the Bellcore configuration. Party B also guarantees that any new inventions and improvements in the proprietary technology for production of Batteries shall be provided to the Joint Venture Company at no fee, excepting reimbursement of any direct travel or communication costs required for the provision of such technology, consistent with the terms of the Contract for Technology Investment. In this Article, "Powder" shall mean the Cathode Active Materials (defined below) required for the fabrication of the Batteries. In this paragraph, "Batteries" shall mean and include any aggregate of components or compositions of matter primarily adapted for storing or providing electrical energy and which include a positive and negative electrode, at least one of which shall include materials made from Cathode Active Materials, and the other shall include a carbonaceous anode material. "Cathode Active Material(s)" shall mean Lithium Cobalt Oxide, Lithium Manganese Dioxide, Lithium Nickel Oxide, Lithium Nickel Cobalt Oxide, Lithium Manganese Oxide Spinel and Lithium Iron Magnesium Phosphate, and Lithium Phosphate material. Page 12 Article 47 Until such time that the Joint Venture Company is capable of providing cost-effective, high quality Powder that satisfies all technical specifications identified by Party B, the Parties agree that either Party B or the Joint Venture Company shall have the right to purchase Powder from a Third Party. In no circumstances shall the Joint Venture Company offer the Powder for sale to Third Parties. Both Party A and Party B agree that they will not compete with the Joint Venture Company or with each other utilizing knowledge or expertise or production capabilities gained from the Joint Venture Company or gained from the Parties' respective technology contributions thereof. CHAPTER 9 SALE OF PRODUCTS AND USE OF TRADEMARK Article 48 The Joint Venture Company may sell the Joint Venture Products in the domestic and overseas markets, and may entrust Third Party's to sell the Joint Venture Products with approval from the Board of Directors. Article 49 It is the intention of the parties that no less than 50% of the Joint Venture Products should be sold overseas. Article 50 Each Party retains all ownership to its trademarks, service marks, logos, trade names, and similar designations identified in Exhibit B of the Contract for Technology Investment and any other such marks which such Party may from time to time designate in writing, and the other Party and the Joint Venture Company will neither register or use, directly or indirectly, any mark that is identical or confusingly similar to Valence's marks or any translations or transliterations thereof, anywhere in the world. Notwithstanding the foregoing, the Joint Venture Company may register its own trademarks, service marks, logos and trade names, and it may use the marks owned by a Party without compensation, provided that the use is in accordance with terms of a written trademark license contract signed with
"""

Extract the exact clause related to "Anti-Assignment" from the excerpt above.