I don't know where you are located but
Barrigar Intellectual Property Group has some great free info on the site, they are intellectual property specialist lawyers, tm's, patents ect. Micheal Cooper is the firms senior partner on there site for free 1/2 hour consult. He is licenced for canada and usa.
A quick suggestion is to watermark any grafics, fotos, backgrounds ect, so anyone who copies can be found with these embeded.