D&M Holdings, Inc., et al. v. Sonos, Inc.

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Richard G. Andrews



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  1. February 21, 2018

    Sonos Gets Judge To Kill Home Audio Patent Under Alice

    A Delaware federal judge on Tuesday invalidated a home audio patent that D&M Holdings accuses rival Sonos of infringing, saying the invention is routine and conventional in one of the first decisions to apply new Federal Circuit rules for such summary judgment motions.

  2. October 23, 2017

    Sonos Patents Picked Over Rival's For Trial Over Audio IP

    A judge on Monday sided with speaker manufacturer Sonos in determining what kinds of wireless speaker patents will be the focus of an upcoming trial against rival Denon in Delaware federal court, saying that Sonos' choices would be less "cumbersome" for proceedings in which multiple patents are at stake.

  3. October 20, 2017

    Sonos Wants Wrong Patents In Audio IP Trial, Says Rival

    An upcoming trial over patents for wireless home audio systems will be impossibly unwieldy if it includes all three patents that home audio giant Sonos wants to include, rival Denon told a Delaware federal court on Friday, saying Sonos flouted explicit instructions from the judge.

  4. April 19, 2017

    Sonos Gets Judge To Kill 2 Of Rival's Patents Under Alice

    Sonos Inc. has trimmed some claims from its patent fight with rival audio equipment maker D&M Holdings Inc., as a Delaware federal judge ruled Tuesday that two D&M patents were invalid under the U.S. Supreme Court's Alice standard.

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