Do a search at :
http://www.uspto.gov/index.html
Also ask what is trademarked, who is the owner, and what is the classification of the trademark. You can also ask that verification be faxed to you.
I did a search and found nothing. Is it a trademark or a servicemark.
Also, I would contact a local attorney who specializes in trademarks and patents and see what is the best route you should take.
I can understand why he's upset. You both are offering the same services with similiar names.
I already know the outcome, but I'll stay on the hush.
Ms. Program