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Cisco, Linksys Sued Over VoIP Patent

Law360 (October 16, 2007, 12:00 AM EDT) -- Patent holding company ESN LLC has filed a patent infringement suit against Cisco Systems Inc. and its subsidiary Linksys, claiming infringement of a recently issued patent for voice over Internet protocol technology.

According to a complaint filed Monday in the U.S. District Court for the Eastern District of Texas, the U.S. Patent and Trademark Office issued U.S. Patent Number 7,283,519 to ESN on Oct. 16. The company claims that Cisco and Linksys are selling products that infringe on the ‘519 patent, including numerous router models and...
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