BitLaw: Trademark Searching (this law firm provides patent, trademark, and copyright services to clients)

Google Patent Search* – Link & Guidelines for Use (Neustel Law Offices)

*the Google Patent Search is in Beta

Searching the Copyright Office and Library of Congress Records (from Stanford University Libraries)

United States Patent & Trademark Office

Patent Basics
Search Patents – Full Text & Image
Trademark Basics
Search Trademarks (TESS)
American Inventors’ Protection Act of 1999

United States Copyright Office – Copyright Basics

Search Copyrights Since 1978

University of Texas – Patent Search Tutorials

November, 2011: Broken Link? Please let us know. Thanks!