RIM Shares Drop After $8.87 million Ruling in Patent Case

Research In Motion Ltd. shares slumped more than 13 percent after a negative court ruling in a patent infringement suit in the United States involving its BlackBerry e-mail device. Waterloo, Ontario-based RIM said the latest ruling in its lawsuit with privately held NTP would force it to take further provisions, including between $8 million and $9 million in its first quarter.