I, on behalf of the World Intellectual Property Organization (WIPO), said that the patent was approved by the PCT treaty.
The main function of this organization is to promote the protection of intellectual property rights around the world through cooperation between countries, manage the administrative work of 23 alliances on patents, trademarks and copyrights based on multilateral treaties, and handle legal and administrative matters of intellectual property rights.
All patent applications made through PCT (Patent Cooperation Treaty) begin with WO after international publication. In the subsequent stage, the PCT application can enter various national stages according to the applicant's choice.
Patent number means that it is registered by WIPO, and patent applications can be filed in many countries, marked with WO patent number, which is more used for patent search of the same family.
Extended information:
China joined the organization on June 3, 198, becoming its 9th member. China acceded to the Paris Convention for the Protection of Industrial Property Rights in 1985, the Madrid Agreement for the International Registration of Trademarks in 1989, the Berne Convention for the Protection of Literary and Artistic Works in October 1992 and the Patent Cooperation Treaty on January 1, 1994. By January 1999, China had acceded to 12 treaties under the jurisdiction of the organization.
the numbering form of the latest patent application number (***12 digits, plus a decimal point) enabled on October 1, 23:
application year number+patent application type+application sequence number+computer check bit.
the first four digits indicate the application year number, and the fifth digit indicates the application type:
1= invention patent application;
2= utility model patent application;
3= application for patent for design;
8= PCT invention patent application entering the national phase in China;
9= PCT utility model patent application entering the national phase in China.
Reference: Baidu Encyclopedia-World Intellectual Property Organization
Reference: Baidu Encyclopedia-Patent No.