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Sonos Wins Patent Ruling Against D&M Holdings

Santa Barbara-based whole home audio systems developer Sonos has scored a win in the courts this week, when a federal judge invalidated a home audio patent held by D&M Holdings, the owner of such brands as Denon and Boston Acoustics. D&M Holdings had filed a patent infringement suit (D&M Holdings et al. v. Sonos Inc.) against Sonos in March of 2016, saying that Sonos had infringed on U.S. Patent No. 7,995,899, entitled "Apparatus, method and database for control of audio/video equipment". Sonos has its own patent infringement lawsuits against Denon, which it claims has been copying the design of its speakers.