Searching and downloading of other patents available online as a commercial service. Inc. This fully searchable bibliographic file contains all of the approximately 1.7 million U.S. patents issued since 1975. The Brainwave information service offers a number of specialized searching services over the Internet, including full text patent searching. Derwent Scientific and Patent Searching Services Description of services available over the Internet from Derwent, a leading specialist in scientific and patent information worldwide. Searches are performed using patent data in CD-ROM, microfilm, and print covering Canadian, U.S. and European patents.
Databases cover a wide range of international patent information.
The Sloane Companies conduct prior art searches for the development of patentability, validity and infringement reports concerning electrical, mechanical, chemical and biosciences technologies. The CPI is most useful as a tool for finding patents by specific inventors or assignees. The subject searching capabilities of the database are limited. Other Patent Searching Resources Patent Classifications Descriptions of patent classification categories used by the U.S. Patent and Trademark Office Directory of Patent and Trademark Depository Libraries Directory of addresses and telephone numbers of regional libraries containing patent collections which are organized in patent number sequence and are available for use by the public free of charge. Directory is maintained by U.S. Patent and Trademark Office.