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Patents.com
Patents.com provides a comprehensive worldwide source of searchable indexed patent pages available in 15 native languages.
Delphion Intellectual Property Network
For international patent and us patent information, the Delphion intellectual property network's patentsearch database helps businesses perform intellectual property ...
United States Patent and Trademark Office
Official site for the United States Patent and Trademark Office. Find how-to guides, office policies and laws, forms, fee schedules, news, upcoming conference and ...
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Patent Laws, Consolidated [PDF] (35 U.S.C) Search patents at the European Patent Office Japan Patent Office. See Patents for more information
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Free Patents Online
Patent Searching. The FreePatentsOnline search engine is one of the most powerful, fastest and easiest patent search engines on the web. Our search allows advanced search techniques ...
Prior art - Wikipedia, the free encyclopedia
Prior art (also known as state of the art, which also has other meanings, or background art [1]), in most systems of patent law, [2] constitutes all information that has been made ...