A "patent troll" type company that owns a single patent (not their own invention) has added Apple and its FaceTime and and Messages to a long list of companies it is suing for patent infringement. The patent, granted in 2006, concerns "an inter-carrier messaging service providing phone number only experience." It was assigned to the Texas company Intercarrier Communications expressly for the purpose of suing other companies. Apple and a number of other companies have been sued over the patent in the last week.