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AT&T, Sprint Hit Over Cell Phone Locator Patent

By Melissa Lipman ( March 13, 2009, 12:00 AM EDT) -- Tendler Cellular of Texas LLC has slapped five major cellular carriers — including AT&T Mobility LLC, Sprint Nextel Corp. and T-Mobile USA Inc. — with a suit accusing the telephonic giants of infringing a patent for a system to identify the location of a wireless caller with their E911 services....

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