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Patent Search Engines

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Espacenet offers free access to more than 70 million patent documents worldwide, containing information about inventions and technical developments from 1836 to today.
This facility allows you to search 1,949,795 international patent applications and to view the latest information and documents available to the International Bureau.
This database lets you access over 75 years of patent descriptions and images. You can search, retrieve and study more than 2,000,000 patent documents.
The United States Patent and Trademark Office (USPTO) is the Federal agency for granting U.S. patents and registering trademarks
Last Updated ( Friday, 21 October 2011 08:41 )  
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