The University of Sheffield
The University Library

Patents

Delphion Intellectual Property Network Databases of patents from the U.S.A., Europe, Japan and PCT patents application data from World Intellectual Property Organization (WIPO). Descriptions and images of most patents are available free of charge, the full text can be downloaded for a fee
European Patent Office Uses Esp@cenet - an index to European, worldwide and national patents
FreePatentsOnline.com Patent searching database
Intellectual Property Government backed web site provding information about U.K. intellectual property including patents
Patents Information Service From the British Library Science Technology Business has links to patent and other intellectual property information resources
U.S. Patent and Trademark Office Includes the U.S. full text database of patents since 1976
World International Property Organization Includes texts of Treatries on Intellectual Property adminstered by WIPO