United States Patent and Trademark Office
The USPTO is a federal agency in the Department of Commerce. The USPTO occupies five interconnected buildings in Alexandria, Virginia. The office employs over 7,000 full time staff to support its major functions--- the examination and issuance of patents and the examination and registration of trademarks.
US Copyright Office
The Copyright Office provides expert assistance to Congress on intellectual property matters; advises Congress on anticipated changes in U.S. copyright law; analyzes and assists in drafting copyright legislation and legislative reports and provides and undertakes studies for Congress; and offers advice to Congress on compliance with multilateral agreements, such as the Berne Convention for the Protection of Literary and Artistic Works.
European Patent Office
The European Patent Office (EPO) provides a uniform application procedure for individual inventors and companies seeking patent protection in up to 38 European countries. It is the executive arm of the European Patent Organization and is supervised by the Administrative Council.
World Intellectual Property Organization (WIPO)
WIPO was established by the WIPO Convention in 1967 with a mandate from its Member States to promote the protection of IP throughout the world through cooperation among states and in collaboration with other international organizations. Its headquarters are in Geneva, Switzerland.