In Battle with Sonos, D&M Takes Yet Another Blow

Sonos Seeks Permanent Injunction Against Infringing Products The battle rages on between D&M Holdings and Sonos over the patent infringement lawsuit brought by Sonos in 2014 against the HEOS by Denon line, and in which Sonos won the first set … Continue reading

Sonos to Seek Injunction to Stop HEOS Sales of ‘Infringing Technology’

BREAKING NEWS Case May Have Major Impact on Wireless Speaker Business As we recently reported, a federal jury gave Sonos a sweeping victory in the first “bellwether trial” in Sonos Inc. v. D&M Holdings Inc. et al, siding with Sonos … Continue reading

Long Simmering Sonos vs. D&M Lawsuit is Now Boiling Over

Trial is Next Week; Sonos Makes Big Mistake Ever since Sonos filed their patent infringement case against D&M Holdings – in reference to its then new HEOS line – things started out like the opening salvo in a boxing match. … Continue reading

Sonos Wins Dismissal of Multiple D&M Holdings Counterclaims

Just one month after Delaware District Court judge Richard G. Andrews ruled against D&M Holdings’ attempt to have four key Sonos patents invalidated, we learn that Sonos was successful in winning a dismissal of three of D&M Holdings’ counterclaims of … Continue reading