Marksmen.com - Trademark investigations, acquisitions and monitoring. - http://www.marksmen.com/
Arvic Search Services Inc. - Arvic, a firm of trademark agents and search professionals, offers a complete, yet inexpensive, search of both the American and Canadian Federal Governments Trademark Registry Databases - http://www.arvic.com/
Mr. Trademark - Offering trademark and domain name searches, legal information, and forms processing services. - http://www.mrtrademark.com/