The relevant contents of the patent licensing contract shall be registered in the patent register by China National Intellectual Property Administration, and the following contents shall be announced in the patent gazette: licensor, licensee, main classification number, patent number, application date, authorization announcement date, license type and duration, and application date.
You can ask China National Intellectual Property Administration to issue a copy of the patent register.
Download and fill in the "copy document request 10003 1" in the "office area and form download" column on the homepage of China National Intellectual Property Administration website, and then send it by registered mail to the business problem management office of the preliminary examination and process management department of China National Intellectual Property Administration Patent Office (hereinafter referred to as the problem office of the preliminary examination department of the Patent Office) (No.6, Xitucheng Road, Jimenqiao, Haidian District, Beijing).
100088).