This may seem a little off topic and I apologize, but this is the closest SE site I can think to post on regarding my issue.
I live in the state of Illinois. I have an app in the Apple iPhone AppStore called "The Dirty Mind Test". The other day, I got a letter from the lawyers of a company called TDC Games. They claimed they own the right to the trademark "Dirty Minds", and that my app is clearly infringing on their copyright. They said we must take our app down by the 1st of February to avoid legal action.
I dont see how they can own a trademark or copyright on a totally generic term. They claim they own "Dirty Minds", but my app is called "The Dirty Mind Test". Do they have a case? What should I do?