Foreign Patents

European Patent Office
http://www.european-patent-office.org/
By filing a single patent application in one of the three official languages (English, French, or German) it is possible to obtain patent protection in all 18 member states of the EPO.
- Espacenet
  http://worldwide.espacenet.com/?locale=en_EP
  Search 45 million patent documents.
Canadian Intellectual Property Office
http://cipo.gc.ca/
- The Canadian Patent Database
  http://patents1.ic.gc.ca/intro-e.html
  lets you access over 75 years of patent descriptions and images. You can search, retrieve and study more than 1,500,000 patent documents.
- You can also search the the Canadian Trade-marks Database http://strategis.ic.gc.ca/cipo/trademarks/search/tmSearch.do
Japanese Patent Office
http://www.jpo.go.jp
- The Industrial Property Digital Library (IPDL)
  http://www.ipdl.inpit.go.jp/homepg_e.ipdl
  offers the public access to Japanese Patents (click on PAJ), well-known
  Japanese Trademarks and IP Gazettes of the JPO.
Other Intellectual Property Offices
http://www.uspto.gov/web/menu/other.html
Links from the USPTO to foreign intellectual property offices