1, the parties can log on to the the State Council portal website, click on the patent-related content, and follow the specific instructions to check whether the patent is authorized;
2. The parties concerned may go to the local patent administration authority and apply for checking whether the patent is authorized.
legal ground
Article 9 1 Detailed Rules for the Implementation of People's Republic of China (PRC) Patent Law
The administrative department for patent in the State Council shall provide patent bulletins, pamphlets on application for invention patents and pamphlets on invention patents, utility model patents and design patents for the public to consult free of charge.
Article 118
With the consent of the patent administration department of the State Council, anyone can consult or copy the file and patent register of the patent application that has been published or announced, and may request the patent administration department of the State Council to issue a copy of the patent register.
The file of a patent application deemed to be withdrawn, rejected or automatically withdrawn shall not be kept after 2 years from the date when the patent application is invalid.
The files of abandoned, invalidated and terminated patent rights shall not be kept after the expiration of 3 years from the date of invalidation of patent rights.