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AT&T, Verizon Wireless, Sprint sued by NTP on patents

AT&T Inc., Verizon Communications Inc. and Sprint Nextel Inc., the three biggest U.S. wireless carriers, were sued by NTP Inc. in patent-infringement complaints similar to one it used to target the BlackBerry device. NTP is a closely held licensing company that successfully sued Research In Motion Ltd., maker of the BlackBerry. That case was settled last ...

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