Online Reference Tools: Patents & Trademarks

Canadian Patents & Trade-marks

Canadian Patents Database: Over 75 years of information. Full patent descriptions and images of patents since August 15, 1978. Prior to August 15, 1978 no abstracts or claims.
Canadian Trade-marks Database: The database comprises all active and many inactive trade-marks either applied-for or registered pursuant to the current Trade-marks Act or former trade-mark legislation.
Patents FAQ: Basic information on Canadian patents, including which inventions are patentable, who may apply for a patent, etc.

FreePatentsOnline: Provides fast, easy-to-use access to patents and patent applications.
Patent Law Materials: Information on U.S. patent law.
Search the U.S. Patent Database: Brief Info + abstract + exemplary claims of U.S. patents . Lacks other claims and diagrams.
Tutorial on Searching by Patent Number: Much useful info about patent sites, including a tutorial on searching by patent number.
U.S. Patent Office Databases: 1976- Includes full-text database + links to images of patents.
United States Patent and Trademark Office - Trademarks: Includes the full bibliographic text of pending and registered U.S. trademarks.