Downloadable intellectual property-related informative articles:
Canadian Intellectual Property Office Patent Database
Free searching and viewing of the last 80 years of Canadian patents. Patents can be downloaded at no charge.
United States Patent and Trademark Office Patent Database
Delphion Patent Server – free searching and viewing of last 26 years of US patents. Account required to order Patents.
Esp@cenet - Search European, Japanese and PCT published patent applications.
Reedfax – Order US and Foreign Patents and File Histories. Account required.
Infomart Dialog – Search a variety of Patent and non-patent Databases, some of which are free (others require an account).
Derwent – Patent and Scientific Information Provider. Account required.
Micropatent – Will search Patent and Trademark Databases for you. Account required.
Google Patents - Free keyword searching on a database of all United States patents. Free Patent Downloads.
Free Patents On Line - Free searching on a US patent database.