Click here for more information. Search this database for articles in over 1200 primary business information sources by keyword or browse the Subject Index for terms like Patents or Trademarks . Click here for more information. There are over 2 million patents that date back to January 5, 1971. You will need to register to use this site for free searching of patents dating back to 1974.
Free access is limited but includes an abstracts database and a demo database.
U.S. Patent and Trademark Office Homepage of the United States Patent and Trademark Office. Provides access to Patents Databases , using a powerful and easy to use search engine. Includes information on inventor, assignee, abstract, cited U.S. and foreign patents, other cited references including journal articles, books, technical reports, company literature, etc. The site has been upgraded to include drawings and full text. This is the same file the trademark examiners use, and it allows very complex searches.