WIPO – 检索国际和国家专利汇编 1735

https://patentscope2.wipo.int/search/zh/search.jsf

• 专利查询

世界知识产权组织（http://www.wipo.int/portal/zh/index.html），知识产权服务、政策、合作、知识、知识产权组织

https://patentscope2.wipo.int/search/zh/search.jsf

分类：BP001



This patent search tool allows you not only to search the PCT database of about 2 million International Applications but also the worldwide patent collections. This search facility features: flexible search syntax; automatic word stemming and relevance ranking; as well as graphical results.