Search for Patent Documents

Search for Patent Documents

Patent Documents Databases

Wangfang Patent Database Search for patent information in various fields in China

Incopat Patent Database Search for patent information in various fields in China

Derwent Innovations Index Search for important global patent information including the U.S. A and China


Access to the Free Patent Websites

Google Patents Search for all U.S. patents It provides the full text of U.S. patents, European patents, world patents, and abstracts of Japanese patents. Features: Users can use the chemical molecular formula to search; it can be searched by enterprise, subject, etc.)

Soopat Patent Search (Professional Chinese patent search engine, providing Chinese and foreign patent search services, and patent-related technology, law, business, etc. The patent analysis function is relatively new)


Access to the Websites of Patent Offices

The full text of patent documents can also be obtained by visiting the patent search systems on the websites of patent offices of various countries

China National Intellectual Property Administration

European Patent Office

United States Patent and Trademark Office
Japan Pantent Office
World Intellectual Property Organization(WIPO)

UK Patent Office

German Patent and Trade Mark Office

Swiss Federal Institute of Intellectual Property

Intellectual Property Department, The Government of the Hong Kong Special Administrative Region

Government of the Macao Special Administrative Region, Economic and Technological Development Bureau


Ask the Librarian

Users can send an email to, and our staff will give you a satisfactory answer.