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This guide to patent searching lists relevant databases to finding US, World, and European patents.
Last Updated: Jun 11, 2014 URL: http://guides.library.cornell.edu/patents Print Guide RSS UpdatesEmail Alerts

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The Best Patent Web Sites

  • Google Patents

    Fastest place to go for all U.S. patents, U.S. patent applications, and European patents.
  • Patent Lens
    Contains US patents from 1976+, European, World, and Australian patents. Contains patent applications from U.S., World, and Australia.

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Free Patent Databases

  • Google Patents

    Covers the entire collection of granted patents and published patent applications from the USPTO and the EPO. US patent documents date back to 1790, EPO to 1978.
  • Canadian Patents Database
    Canadian Intellectual Patent Office (CIPO) contains all Canadian patents and images from 1933 to the present.
  • European Patent Office - esp@cenet
    Esp@cenet contains European patents, World patents, and patent applications. Ability to search patents by origin country (i.e. CN for China). Downloadable and printable in PDF.
  • FreePatentsOnline
    Requires registration to access PDFs of patents. Allows for RSS feeds and PDF and XML data downloads.
  • Japan Patent Office (JPO)
    Access to japanese patent abstracts.
  • Patent Lens
    Contains US patents from 1976+, European, World, and Australian patents. Contains patent applications from U.S., World, and Australia. Searches full-text, downloadable into RIS format.
  • Patent Storm
    U.S. patents from 1976 foward. Contains U.S. and foreign citing patents.
  • United States Patent and Trademark Office
    Access to all U.S. patents and U.S. patent applications. Best place to search by patent class. Search interface is still clumsy, recommend other databases on this page first.
  • United States Patent Statitistics
    Patent statistical reports based on organization, geographical location, technology, and inventor.
  • WikiPatents
    Database of patents open for public comment, PDF downloading of patents, and free patent translation into multiple languages.
  • World Intellectual Property Organization/ PATENTSCOPE
    Using PATENTSCOPE you can search 36 million patent documents including 2.2 million published international patent applications (PCT).

Engineering Librarian

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Jill Powell
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