The patentee or the assignor of the patent right shall repay the whole or part of the fee for the exploitation of the patent or the price for the assignment of the patent right to the licensee or the assignee of the patent right.

• 专利权人或者专利权转让人应当向被许可实施专利人或者专利权受让人返还全部或者部分专利使用费或者专利权转让费。