- The United States Patent and Trademark Office web site containing up to date information regarding United States Patents and Trademarks, statistics, downloadable forms and more.
- General information concerning U.S. patents and patent applications, patent laws, and answers to frequently asked questions.
- Current United States Patent and Trademark Office Fee Schedule.
- Terms of U.S. patents extended under private law, 35 U.S.C. §155 and §156.
- Search and browse the Official Gazette Notices from July 1, 1964 to the present.
- European Patent Office web site including course and seminar information, news and updates, and more.
- Member countries of the European Patent Office including their two letter codes and the list of Patent Information Centres for each country.
- World Intellectual Property Organization (WIPO) and Patent Cooperation Treaty (PCT) System web site including a seminar calendar, forms, press releases and updates, the PCT Gazette and more.
- List of countries available under the Patent Cooperation Treaty System (PCT) and their two letter codes.
