The complete scanned image of a patent can be displayed. Images are available for patents issued from 1974 to present. There is a summary of missing or incomplete patent data and a list of what's new. 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.