Trademarks
http://www.inta.org/ International Trademark Association (INTA)
The International Trademark Association (INTA) is a not-for-profit worldwide membership organization of trademark owners and advisors. INTA represents trademark owners to protect and advance the importance of trademarks as essential elements of international commerce. INTA shapes public policy, advances practitioner's knowledge and educates business, the media and the public on the significance of trademarks..
http://www.patentcafe.com/ PatentCafe
The World's Trusted Intellectual Property Portal. Patents . Trademarks . Copyrights . Intellectual Property.
http://www.intelproplaw.com/Trademark/ The Trademark Page at the intellectual property law server.
Including a Searchable Trademark Database.
http://www.uspto.gov/ U.S. Patent and Trademark Office (PTO)
W The PTO is a non-commercial federal entity and one of 14 bureaus in the Department of Commerce (DOC). The office occupies a combined total of over 1,400,000 square feet, in numerous buildings in Arlington, Virginia. The office employs over 5,000 full time equivalent (FTE) staff to support its major functions--- the examination and issuance of patents and the examination and registration of trademarks..
http://lcweb.loc.gov/copyright/ U.S. Library of Congress Copyright Office.
HCCC OPAC - A listing of trademark materials in the HCCC Library.