Patent-Holding Co. Refiles Cisco Infringement Suit

Law360, New York (February 1, 2008, 12:00 AM EST) -- Patent-holding company ESN LLC has refiled a patent lawsuit against Cisco Systems Inc. and its subsidiary Cisco-Linksys LLC, a few months after dropping an identical suit over voice over Internet protocol technology.

The suit, filed Thursday in U.S. District Court for the Eastern District of Texas by Connecticut-based ESN, alleges Cisco has infringed on U.S. Patent Number 7,283,519 by selling products that include numerous router models and IP telephone systems.

The ‘519 patent, titled “Distributed edge switching system for voice-over-packet multiservice network,” describes switching systems that...
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