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Earlier this week, a company called Tune Hunter accused music-finding service Shazam as well as a host of consumer electronics makers, wireless service operators, and digital music retailers of infringing on its patent on a music identification system.Shazam is named along with Samsung, Apple, Amazon.com, Napster, Motorola, Gracenote, Verizon Wireless, LG Electronics, AT&T Mobility, and Pantech Wireless in a suit filed Tuesday over U.S. Patent No. 6,941,275, which was issued to Remi Swierczek/Tune Hunter in September 2005. The suit accuses Shazam's music discovery and identification service of violating the patent and the other companies of benefiting directly from Shazam's alleged infringement. Tune Hunter is asking for unspecified damages and an injunction from the U.S. District Court for the Eastern Division of Texas that would prevent "further infringement" on Tune Hunter's patent.Tune Hunter's patent covers "a music identification/purchasing system, specifically to a method for marking the time and the name of the radio station in portable device such as a key holder, watch, cellular phone, beeper or the like which will allow the user to learn via internet or regular telephone the name of the song, artist and/or music company by matching the stored data with broadcast archive."Shazam is available on several different mobile devices. It is a popular iPhone application sold through Apple's App Store, which "listens" to songs and identifies them. Samsung is a partner with London-based Shazam on a mobile music store. Amazon.com, Napster, and Gracenote are retail partners of Shazam.Shazam was founded in 2002 in London and says by the end of the year its service will be available on 250 million devices.Shazam, AT&T, Apple, and Gracenote each said they had no comment on the suit, and Samsung and Verizon had not yet heard about it.Shazam is also available on many platforms not named in the lawsuit, including Research In Motion's BlackBerry, Facebook, and Android-based phones like T-Mobile's G1.