World Intellectual Property Organization

http://www.wipo.int/portal/index.html.en

World Trade Organization

www.wto.org

United States Patent and Trademark Office

www.uspto.gov

European Patent Office

www.european-patent-office.org

The UK Patent Office

www.patent.gov.uk

Japan Patent Office

www.jpo.go.jp

ROSPATENT - Patent and Trademark Office of Russian Federation

www.fips.ru/ensite

Delphion – intellectual property network

www.delphion.com