If the valid duration of the patent right expires or the patent right is declared invalid, the patentee may not conclude a patent exploitation license contract relating to that patent with others.
专利权有效期限届满或者专利权被宣布无效的，专利权人不得就该专利与他人订立专利实施许可合同。
Revising, writing or assisting in writing teaching materials without demanding any financial request during the valid duration of this contract.
在本合同有效期内，修改，编写或协助编写教案且不要求报酬。
Revising, writing or assisting in writing teaching materials without demanding any financial request during the valid duration of this contract.
在本合同有效期内，修改，编写或协助编写教案且不要求报酬。
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