INTA addresses public policy matters concerning trademarks, and educates business, the media and the public on trademarks. This site has helpful information about trademarks, such as FAQs, the Trademark Basics guide, the Trademark Checklist, and more. There are over 2 million patents that date back to January 5, 1971. Patents Information Search a database of U.S. patents on the U.S. Patent and Trademark Office website. QPAT-US 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. Has been upgraded to include drawings and full text. It allows you to search registered and pending US trademarks, including search and display of logos.