1, patent retrieval and service system of China Bureau: EPO- comprehensive patent information retrieval, and multi-language translation.
2. US Monopoly Bureau: Patent Search World Intellectual Property Organization-Search international and national patent collections.
3. Japan Bureau: Patents &; Utility model bulletin database.
4. Korea Bureau: KIPRIS (Korea Intellectual Property Information Service), a free patent information search service.
In fact, due to the openness of patent information, many of the above retrieval systems contain more patent information than domestic ones. For example, the system of the European agency contains a lot of patent information of the United States and Japan.
Patent system is an internationally accepted system that uses legal and economic means to confirm the inventor's exclusive right to his invention in order to protect and promote technological inventions. Venice was the first country to implement the patent system.
The essence of the patent system is openness in exchange for protection, so patent management agencies in various countries are obliged to provide patent information to the public (most of them are free, but they dare not say anything in case of exotic feelings).
Therefore, the official websites of patent administrations of major countries and organizations can carry out patent search. Patent retrieval can be simply divided into two categories: patent text retrieval and patent examination process examination. The former is mainly to retrieve a large number of published patent texts, while the latter is to lock a patent and view the review process in a specific country (that is, the notice of review opinions and comments).