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On February 21, 2012, a Comcast subsidiary filed the second patent-infringement lawsuit in as many weeks against Sprint Nextel and certain Sprint affiliates
On May 10, 2011, Klausner Technologies filed a patent-infringement suit in the United States District Court for the Eastern District of Texas against various parties, including carriers Paetec, Primus, Windstream, and XO, and manufacturers Alcatel-Lucent, NEC, Samsung, Siemens, and Toshiba
