Motorola sues Research in Motion

Motorola Inc. sued Research In Motion Ltd. claiming the Canadian company's BlackBerry wireless e-mail device violates seven U.S. patents covering mobile-communications technology.

Motorola, the biggest U.S. maker of mobile phones, said Research In Motion is using the inventions without permission and asked a federal judge in Marshall, Texas, to order a stop. Motorola also is seeking cash compensation for past infringement of the inventions, according to the complaint filed Feb. 16.