1, China patent inquiry system portal: This is a patent inquiry system sponsored by China National Intellectual Property Administration, China, which mainly includes major modules such as patent application publication, patent application authorization and patent application reply. Users can enter relevant information such as patent name, patent number or applicant, and the system will automatically match the relevant information and return the corresponding query results.
2. Patent Retrieval and Analysis System (CNIPA): It is the official website of patent retrieval in China National Intellectual Property Administration, and you can use it for free by registering an account. Its retrieval methods include conventional retrieval, advanced retrieval and command line retrieval.