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D&M Holdings, Inc., et al. v. Sonos, Inc.
February 21, 2018
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.
October 23, 2017
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.
October 20, 2017
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.
April 19, 2017
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.