Patent Databases
Patent Full-Text and Full-Page Image Databases-----
United States Patents and Trademark OfficeUnited States Patent and Trademark Office
http://www.uspto.gov/patft/index.html
European and other Patents worldwide
http://ep.espacenet.com/
Canadian Patents
http://patents1.ic.gc.ca/intro-e.html
Indian patents
http://nicmas.nio.org/niolib/patents/pat_facilitat_centre
http://www.indianpatents.org.in/db/testmainb.asp
http://www.indianpatents.org.in/db/testmaina.asp
Free Patent
http://www.freepatentsonline.com/
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