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
Esp@cenet - Search European, Japanese and PCT published patent applications.
Reedfax – Order US and Foreign Patents and File Histories. 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.