Internet Intelligence Resources: Patent Information

          MicroPatent

Free U.S. patent database (abstracts and citations) with inexpensive fulltext available. New fee-based Patent Pending service offers early warning system--e-mail alerts from European and Patent Cooperation Treaty applications.

Official Gazette

Electronic version of the U.S. Patent Office's Official Gazette notices.

Patent Explorer

Derwent's searchable site of U.S. and European patents. A fee-based system with an easy-to-use interface, offering a mix of granted patents, applications and full text abstracts.

Patent Knowledge Center

Derwent's searchable site of U.S. and European patents. A fee-based system with an easy-to-use interface, offering a mix of granted patents, applications and full text abstracts.

Patent Search System

STO's Internet Patent Search System. Provides keyword searchable classification index, international patent information retrieval, patent news service, and links to commercial services.

QPAT-US

Search all U.S. patents issued since 1974. Full-text requires a fee-based subscription. Abstracts are free, but require registration.

The Intellectual Property Network

This free IBM site features an intuitive interface and offers access to patent documents from the U.S., Europe and Japan, plus patent applications from the World Intellectual Property Office.

U.S. Patent and Trademark Office

Comprehensive site offering free fulltext patents and trademarks in a searchable database, plus general information and links to other web sites.