United States Patent and Trademark Office:
www.uspto.gov
European Patent Office:
www.epo.org
Canadian Intellectual Property Office:
www.cipo.gc.ca
Japanese Patent Office:
www.jpo.go.jp
Library of Congress (US Copyright Office):
www.copyright.gov
American Intellectual Property Law Association:
www.aipla.org
World Intellectual Property Organization:
www.wipo.int