Trademark Law - the Lanham Act

Trademark Regulations

Trademark Manual of Examining Procedure (TMEP) - This manual provides trademark examining attorneys in the USPTO, trademark applicants, and attorneys and representatives for trademark applicants, with a reference work on the practices and procedures relative to prosecution of applications to register marks in the USPTO. 

United States Patent & Trademark Office

USPTO Trademark Electronic Search System - search for trademarks

USPTO Trademark Electronic Application System - online trademark applications

USPTO Trademark Law Rules of Practice

USPTO Exam Guide for Registering Domain Names as Trademarks & Servicemarks

Trademark Acceptable Identification of Goods and Services Manual

Thomson & Thomson - world leader in trademark searches & trademark & copyright services

All About Trademarks (GGMARK)

American Intellectual Property Association

Cornell (LII) - Intellectual Property

Delphion Intellectual Property Network

Findlaw Intellectual Property Page

Intellectual Property Owners Association

Intellectual Property Center (LJX)

Intellectual Property Rights Helpdesk (IPR)

Intellectual Property, Copyright, and Fair Use Resources

International Trademark Association (INTA)

IP Form Finder

IpFee - the fee generator for intellectual property legal work

Feebid - fee quote and RFP engine for intellectual property legal services

IpToolbar - intellectual property related links, articles & content

Nameprotect.com

namestake.com

Questel*Orbit

TMLitigator.com - trademark information for lawyers

TMWeb