1. Inquiring about public information: Enter the patent number in China National Intellectual Property Administration Patent Information Disclosure Platform to inquire about all the detailed information of the patent, including the text of the patent certificate, application number, application date, publication date, authorization announcement date, current legal status and other information. If the query results are consistent with the information on the website of the patent registration agency, the patent is a real and effective patent.
2. Check the website of the patent registration agency: check the website of the State Patent Office or other patent registration agencies, and find relevant patent information in the patent database published on the website. Verify the existence of the patent or application, and the status and validity of the patent application.
The above query methods are for reference only, so it is suggested that you choose the appropriate query method according to the actual situation.