RIM Files Patent Suit Over Instant-Messaging Service

BlackBerry maker Research In Motion Ltd. has sued Kik Interactive Inc., a start-up whose instant-messaging service was downloaded by more than a million BlackBerry users in a matter of weeks, for patent infringement and misuse of trademarks. RIM is seeking a permanent injunction banning the use of Kik's messaging application on its BlackBerry devices, as well as unspecified damages.