This site is a very informative, detailed, first stop for patent information. It includes a searchable full-text patent database from 1790-present, forms, lists of contacts, links to many other sites and much more.
Address: Commissioner of Patents and Trademarks, Washington, DC 20231. Patent Assistance Center: 1-800-786-9199. Contact USPTO.
Derwent Innovations Index (patents ; Thomson Reuters). Georgia Tech Library subscription database (GT users only), 1963 to present. Merges the value-added patent information from Derwent World Patents Index with the patent citation information from Derwent Patent Citation Index. Conduct powerful patent and citation searches of inventions in chemical, electrical, electronic, and mechanical engineering.