Mobile real estate applications company Smarter Agent has filed a federal class-action lawsuit alleging patent infringement by major real estate companies including Move, Zillow and Trulia, among others. In the complaint, filed in the U.S. District Court for the District of Delaware, Smarter Agent alleges that the companies named in the suit violated three of its technology patents, all of which allow users to access real estate information via a mobile device. The suit alleges infringement by "making, using, importing, providing, offering to sell, and selling (directly or through intermediaries), infringing products and/or services." The suit names the following companies as defendants: Boopsie Inc., Classified Ventures LLC, HotPads Inc., IDX Inc., Move Inc. and ...