Method 1: Log in to official website, China Intellectual Property Office. According to the relevant navigation to understand the patent information, friends who want to apply for a patent had better know more about the patent application requirements and the patent application process. Official website has published it in detail, and friends who need it can read it in detail.
Method 2: Log on to the patent retrieval website of China Intellectual Property Office. Open the patent query interface. When you move the mouse to a text box, there will be a corresponding prompt, which can be a series of information such as person, type, time and region to query the corresponding patent to avoid duplication. If you don't check the patent number, there will be many similar results. You can rule them out one by one according to your own needs.
Method 3: Other websites can also query. For example: "China Intellectual Property Office". Click "Advanced Search" on the upper right directly to enter the query interface. According to the name and the prompt at the back, you can make a query. According to the fuzzy query of the domain, many results can be queried. If you want to apply for a patent, it is suggested to search in the patent search before applying, so as to avoid the phenomenon of repeated application.
I hope I can help you.