Canadian Patents Database - Search, retrieve and study more than 1,400,000 patent documents. From the Canadian Intellectual Property Office. Patents1.ic.gc.ca/intro-e.html
European Patent Office - The executive body of the European Patent Organisation. www.european-patent-office.org
Moscow PatentBureau - Trademarks, patents and other IP related questions in Russia and other ex-USSR countries. www.mospatent.ru
World Intellectual Property Organization - Responsible for the promotion of the protection of intellectual property throughout the world, and for administration of various multilateral treaties dealing with intellectual property. www.wipo.org