Cisco Systems announced it has countersued Lucent Technologies for patent infringement and responded to the lawsuit filed by Lucent last month in the US District Court in Delaware by denying liability for patent infringement.
Cisco asserted six patents against Lucent in the Delaware action and an additional five in a separate lawsuit filed in the Northern District of California. The patents cover ATM and LAN switching technologies. Lucent has charged that Cisco violated eight patents related to ATM, frame relay and router technology.
"We view Lucent's action as a marketing tactic to slow down industry leaders," said Kevin Kennedy, Cisco's senior vice president, Service Provider Line of Business.