If a patent only refers to whether it has a legal patent right, then the existence of the target patent can be determined by searching. It is necessary to check the information in the patent description project, including the patentee, address, time, patent name, etc., and compare the contents of the patent document with the product to see if they are consistent, and also check the legal status of the patent.
The official website of China National Intellectual Property Administration, Suppat Patent Search Website, Baiteng. Com, China patent retrieval service platform and other websites can be searched. Among them, China National Intellectual Property Administration's website has the fastest and most comprehensive information update, but it is not as easy to use as the following websites.