On the Intellectual Property Office website, you can find 4 search systems through the "Patent Search and Inquiry" on the homepage of the website, namely Patent Search and Service System, China Patent Inquiry System, China Patent Search System and Patent Inquiry. Each of these databases has its own characteristics:
(1) The characteristic of the CPRS system is that it can view comparative literature, that is, the literature cited by the examiner during the review process; in addition, it can also perform IPC classification number Query, classification number association query, legal status query, applicant alias query, etc.
(2) The Chinese patent query system can find all process records of the Chinese patent, including application documents, examination information, patent certificate information, etc. In the United States, this information is charged.
(3) China’s patent search system is relatively simple. It is updated every Wednesday and is the most timely. It is more suitable for situations that require high search timeliness.
(4) Patent query mainly meets some transactional queries, including patent public announcement, legal status, charging information, agency, annual fee payment and mitigation and other information. In addition, the more commonly used Chinese patent databases include Patent Star, the patent information service platform of China Intellectual Property Press, the national key industry information service platform, SooPat, etc. Patent Star search platform Patent Star's "Expert Search" supports logical operations between search terms, which is rare in free Internet resources and is more suitable for people with a certain patent search foundation to do some subject patent analysis. In addition to general field searches, the Patent Information Service Platform (Patent Information Service Platform) can also do some quantitative and qualitative analysis of search results (free users can only meet patent analysis within 10,000 items), including: overall situation analysis, regional analysis , applicant analysis, etc. National key industry information service platform. (Key Industries Patent Information Service Platform) conducts classified navigation for the ten key industries such as automobiles, steel, and electronic information. Taking the automobile industry as an example, navigation bars for engines, chassis, body, etc. have been set up in the industry classification navigation to facilitate technicians to directly find patents on subject technologies for reading. SooPat (Sopatent patent search) is a professional patent search engine, equivalent to Baidu in the patent search world. It has not been around for a long time, but it has had a great influence on many patent workers. It has two modules: Chinese patent and world patent. The world patent module has begun to charge fees. Its characteristics are that it is very convenient to download patent documents. There is a simple statistical function on the left side of the search results page, and the search results can also be sorted by relevance.