Mobile Companies Sued Over Ringback Tone Patents

Law360, New York (April 26, 2007, 12:00 AM EDT) -- A patent suit was filed Wednesday against eight mobile phone companies, including AT&T Inc., Sprint Nextel Corp., T-Mobile USA Inc. and Verizon Communications Inc., alleging the various companies’ ringback tone products infringe two patents.

Greenville Communications LLC filed the complaint in the U.S. District Court for the Northern District of Mississippi. It claims its patents are infringed by a variety of mobile phone companies and their products, specifically the tones that callers hear when they dial a mobile phone.

The patents in suit are U.S. Patent...
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