American Intellectual Property Law Association
http://www.aipla.org/

Association of University Technology Managers
http://www.autm.net/index.cfm

European Patent Office
http://www.european-patent-office.org/index.en.php

International Intellectual Property Institute
http://www.iipi.org/index.asp

Intellectual Property Owners Association
http://www.ipo.org//AM/Template.cfm?Section=Home

International Trademark Association
http://www.inta.org/

Japan Patent Office
http://www.jpo.go.jp/

Licensing Executives Society (USA & Canada)
http://www.usa-canada.les.org/

Licensing Executives Society International
http://www.lesi.org/

The IP Hall of Fame
http://www.iphalloffame.com/

United States Patent and Trademark Office
http://www.uspto.gov/

MARQUES
http://www.marques.org/Default.asp

BLOG@IP::JUR
http://www.ipjur.com/03.php3

IPKat
http://www.ipkat.com/

IP Dragon
http://www.ipdragon.blogspot.com/

IP Geek
http://www.ipgeek.blogspot.com/

Patently-O
http://www.patentlyo.com/

Patent Baristas
http://www.patentbaristas.com/

Spicy IP
http://spicyipindia.blogspot.com/

The 271 Patent Blog
http://271patent.blogspot.com/

Patent Troll Tracker
http://trolltracker.blogspot.com/

Patent prospector
http://www.patenthawk.com/blog/