The United States Patent & Trademark Office (USPTO) - For information on U.S. Patents & Trademarks.

www.uspto.gov

Library of Congress - United  States Copyright Office - For information on U.S. Copyrights and Copyright Law in general.

www.copyright.gov

The European Patent Office (EPO) - For information on applications filed under the EPC.

www.european-patent-office.org 

World Intellectual Property Organization (WIPO)

www.wipo.int

Japanese Patent Office (JPO) - For information on Japanese Patents and Trademarks.

www.jpo.go.jp

U.S. Customs and Border Protection - For information on recording registered U.S. copyrights and/or trademarks to assist the U.S. Customs in their efforts to prevent the importation of infringing products.

www.cbp.gov

U.S. International Trade Commission - For information on Section 337 investigations by the Commission concerning, inter alia, importation of goods infringing registered U.S. Patents and/or Trademarks.

www.usitc.gov