MicroPatent
Tens of millions of digital patents for download, front-page and full-text patent research

Master Data Center
Patent and trademark annuity payment services

Faxpat
Patent and trademark file histories

Optipat
Patents on CD-ROM, patent and trademark document services

International Trademark Association
Internet Corporation for Assigned Names and Numbers (ICANN)
InterNIC
Domain Name Lookup
Domain Name Registrars

The Basics
Basic Facts About Trademarks
International Federation of Inventors' Association
National Congress of Inventor Organizations
The Intellectual Property Information Mall: Franklin Pierce Law Center

US Patent and Trademark Office
World Intellectual Property Organization(PCT)
Japanese Patent Office (JAPIO)
European Patent Office
World Trade Organization - Trade topics as goods, environment, IP, electronic commerce.
European Union Commission - Europa

Japan Law & Government
Canadian Law & Government
National Library Of Australia
Canadian Federal Laws
1991 Act of the UPOV Convention
Berne Convention for the Protection of Literary and Artistic Works (from 1971 Paris agreement)
Convention for the Protection of Producers of Phonograms (1971 agreement among United Nations members)
GATT 1994 (1999-2000 edition)
International Convention for the Protection of Performers, Producers of Phonograms and Broadcasting (text of the 1961 agreement)
Paris Convention for the Protection of Industrial Property (revised 1967 edition)
Patent Cooperation Treaty (text of the 1970 agreement)
United States Code, published by Office of the Law Revision Council
U.S. Patent Act
Universal Copyright Convention (1971 agreement)

Library of Congress Copyright Office
The Copyright Clearance Center On-Line (CCC)
Copyright Society of the United States of America
Australian Copyright Council
Copyright Association of Ireland
Motion Picture Association of America
Music Publishers' Association of the United States
Recording Industry Association of America
Computer Law Association
Software & Information Industry Association

American Bar Association -IP Section
American Intellectual Property Law Association
Intellectual Property Owners Association
International Federation of Intellectual Property Lawyers