Google countersues Sonos for patent infringement

Google has countersued Sonos for patent infringement, following Sonos originally filing a patent lawsuit against Google in January. The lawsuit alleges that Sonos is infringing five Google patents covering mesh networking, echo cancellation, DRM, content notifications, and personalized search

https://www.theverge.com/2020/6/11/21288161/google-countersues-sonos-patents-infringement