You are in the area of Trademark Law. In order to use a name as a trademark, there is a requirement that you serve notice that the mark is your trademark for your product and place a "TM" after the mark. If you are selling your product across state lines, you are engaged in "interstate commerce" and can register your mark with the U.S. Trademark Office. Once the mark has been registered, you replace the "TM" with a. If you have used the "TM" but not yet registered the mark with the U.S. Trademark Office, I recommend that you apply for a registration, indicating that your first use of the mark was January 2012. I hope that this helps and good luck!
Answered on Aug 28th, 2013 at 2:34 PM