Patents

Worldwide from EPO

Access to worldwide patents, offered by the European Patent Office (EPO)

Esp@cenet

WPIndex

Derwent World Patent Index - information on patent publications from the 40 most important industrialised countries.

http://www.derwent.com

UsPatFull

The full text of US patents since 1975, and complete images from 1994 onwards

http://www.uspto.gov/

Japanese Patents

Access to Japanese patents, offered by the European Patent Office (EPO)

Esp@cenet 

Ifipat

Records of all granted US utility patents, back to 1950 for specific applications. IFIPat, the IFI Patent file, includes records of all utility patents granted, reissue patents and defensive publications relating to mechanical and electrical patents from 1963 onwards. It is available through STN International. More information can be found at http://www.cas.org/ONLINE/DBSS/dbsslist.html