Trade­marks have made plenty of head­lines this year. Sarah and Bristol Palin moved to obtain trade­mark pro­tec­tion for their names, Apple sued Amazon for trade­mark infringe­ment over use of the term “App Store” and a com­pany with ties to Charlie Sheen has filed for trade­mark reg­is­tra­tions on 22 of the actor’s catch­phrases. Susan Bar­bieri Mont­gomery, exec­u­tive pro­fessor of law and busi­ness at North­eastern, breaks down the role of trade­marks and how the Internet is changing the game.