- www.delphion.com - The Delphion Intellectual Property Network (IPN) is a premier website for searching, viewing, and analyzing patent documents, providing free access to a wide variety of US, European, and other international patents.
- www.uspto.gov - US Patent and Trademark Office; general information and search on U.S. patents.
- www.wipo.int - The World Intellectual Property Organization (WIPO), part of the United Nations and based in Geneva, Switzerland, is responsible for the promotion of the protection of intellectual property throughout the world.
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