The case is Equine Technologies, Incorporated v. Equitechnology, Inc., and was reported in full in the Law Journal Extra. The issue is trademark law.
Trademarks are words or symbols used to designate the source or origin of a product or service.
If a mark is likely to create confusion within the minds of actual or prospective purchasers of the product or service, there may be a trademark infringement. And if there is, the law will protect the public from the confusion, even if the first user's mark is not federally-registered. The Plaintiff is a Massachusetts corporation and the Defendant is a Florida Corporation. Good, you're on the right track. This, by the way, is something you are not supposed to do.