Useful links

Patent Search

 

United States Patent and Trademark Office

http://www.uspto.gov/main/sitesearch.htm

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Delphion (formerly IBM) Patent Server

http://www.delphion.com/

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Global Patent Offices

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WIPO — World Intellectual Property Organization

http://www.wipo.org/

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Patent Cooperation Treaty Legal Office of the USPTO

http://www.uspto.gov/web/offices/pac/dapps/pct/

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Japanese Patent Office

http://www.jpo.go.jp/

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Canadian Intellectual Property Office

http://strategis.ic.gc.ca/sc_mrksv/cipo/welcome/welcom-e.html

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European Patent Office

http://www.epo.co.at/index.htm

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European Union Commission-Europa

http://europa.eu.int/

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United Kingdom Patent Office

http://www.ipo.gov.uk

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Indian Patent Office

http://ipindia.nic.in