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Resources for Finding Patents
United States Patent and Trademark Office
The United States Patent and Trademark Office (USPTO) provides information on patents, trademarks and intellectual property.
Additional Patent Resources
Espacenet provides access to international patent documents and supporting patent information.
Google Patents allows you to search and read patents and patent applications from around the world.
PatentScope is provided by the World Intellectual Property Organization (WIPO) and includes access to 52 million national and international patents.