Trademark infringement is all about consumer confusion. Does a consumer see the T10A service mark and think tirefAkers is related to Carmetal, maybe a subsidiary? If the T10A mark confuses the consumer into believing their may be a relationship with the companies, you have trademark infringement. If there are enough other distinguishing elements that consumers are simply not confused, no infringement.
There are other ways to obtain trademark infringement, such as through dilution, but consumer confusion is the most likely theory in your scenario.
Hope that helps,
Todd
Answered on Jan 22nd, 2014 at 8:45 AM