Government (U.S.)

Includes bibliographic information and a representative drawing for each patent granted or trademark published on the issue date. Browse by classification, type of patent, (i.e. utility, design, and plant), class/subclass or patentee name. Each website includes access to the most recent 52 issues, with a link to a database for searching older items.

Provides indexing, search capabilities and full-text of U.S patents.

Resource for applying for and searching existing international patents.

Worldwide links and information about patents.

A good starting point for research in patents and trademarks.