Useful patents web links evaluated and selected by a network of subject specialists are listed below:
British Library Patent Information Service
Includes links to free databases for patent searching
Chartered Institute of Patent Agents
Professional and examining body for patent attorneys in the UK
Esp@cenet
(Pronounced espacenet) A free patent search service from the European Patent Office
Institute of Patentees and Inventors
Association offering advice and guidance to members on all aspects of inventing
UK Intellectual Property Office
Official government body responsible for granting intellectual property rights in the UK
US Patent and Trademark Office
Federal agency for the issuance of patents and registration of trademarks