Delphion's Competitors

Stolen from http://www.researchinformation.info/riaut02patents.html on December 31, 2002.

Primary patent-issuing authorities and databases
US Patent and Trademark Office (USPTO)
European Patent Office
Japan Patent Office
German Patent and Trademark Office
UK patent office
World Intellectual Property Organisation (WIPO)

Commercial patent database providers
Derwent
MicroPatent
Delphion
Patent Café

Online hosts
STN
Questel-Orbit
Dialog
CAS

A mine of additional information
The British Library Patents links