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Patents and Patent Searching: Where to Search?

Patent Offices

  • China

National Intellectual Property Administration (CNIPA)

Patent Search and Analysis

Patent search tool by National Intellectual Property Administration, PRC.

  • EU

European Patent Office (EPO)


European Patent Office patent search tool with access to information about inventions and technical developments from the 19th century to the present.

  • US

United States Patent and Trademark Office (USPTO)

Patent Full-Text and Image Database (PatFT) 

United States Patent and Trademark Office patent search.

PATFT starts from 1790.

AppFT starts from March 2001.

  • Japan

Japan Patent Office (JPO)

Japan Platform for Patent Information (J-PlatPat)

Access to patent information including utility-model, design, trademark, etc. Provided by The Japan Patent Office (JPO) and the National Center for Industrial Property Information and Training (INPIT).

  • Korea

Korean Intellectual Property Office (KIPO)

Korean Intellectual Property Rights Information Service (KIPRIS)

Searches for patents, trademarks and designs.

  • World

World Intellectual Property Office (WIPO)


Searchable database of more than 35 million international and national patent documents. "Provides access to international Patent Cooperation Treaty (PCT) applications in full text format on the day of publication. The information may be searched by entering keywords, names of applicants, international patent classification and many other search criteria in multiple languages."

Patent Search Databases

Subscribed by XJTLU Library

Patent Search Platforms

Freely Available Online

Patent search and online research community - developing tools to make searching world’s patent data easier and more convenient

Fast, easy-to-use access to millions of patents with free PDF download

Patent Lens is a worldwide, open-access, free full-text patent informatics resource.