"NTP Inc, which last year won a $612.5 million settlement from the maker of Blackberry, has sued four of the top U.S. mobile service providers for infringing eight patents related to wireless e-mail.
The lawsuits, against Verizon Wireless, Sprint Nextel Corp (S.N: Quote, Profile , Research), T-Mobile USA and the mobile unit of AT&T Inc (T.N: Quote, Profile , Research) were filed September 7 in the U.S. District Court for the Eastern District of Virginia, according to court documents."
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