U.S. Patent Database (search by keyword, inventor name, or patent number) http://www.uspto.gov/patft/ Google Patent Search http://www.google.com/patents European Patents http://ep.espacenet.com/ Worldwide National Patent/ Trademark Offices http://www.uspto.gov/web/ menu/other.html

USPTO Trademark Databases http://www.uspto.gov/main/trademarks.htm U.S. Patent and Trademark Office http://www.uspto.gov Intellectual Property Digital Library http://www.wipo.int/ipdl/en/ Basic Patent and Trademark Information http://www.lib.clemson.edu/GovDocs/patents/newpat.htm See also Copyright