A leading source of patent information, Lens Indexes patent documents from United States Patent and Trademark Office (USPTO), European Patent Office, World Intellectual Property Organization (WIPO), and Australian Patent Office. It also allows users to search and analyze biological sequences found in patents.
The European Patent Office provides this online presentation to help you get started with patent searching.
Mississippi Library Commission
"The Mississippi Library Commission was designated as an official Patent & Trademark Depository Library (PTDL) in 1990 by the U.S. Department of Commerce, Patent and Trademark Office. A wide variety of services are provided from extensive holdings of patent & trademark resources. While the primary users are inventors, attorneys, and researchers. the services are open to the general public."