Sonos sues Google, alleging it stole its wireless speaker technology January 7, 2020 https://www.cnbc.com/2020/01/07/sonos-sues-google-for-stealing-its-wireless-speaker-technology.html The New York Times: Sonos, Squeezed by the Tech Giants, Sues Google
Amazon’s hardware boss responds to Sonos accusations of stolen technology VP Dave Limp sticks to a friendly tone and says Sonos should focus on competing January 8, 2020 https://www.theverge.com/2020/1/8/21056851/amazon-dave-limp-interview-sonos-google-response
Google countersues Sonos for patent infringement June 11, 2020 https://www.theverge.com/2020/6/11/21288161/google-countersues-sonos-patents-infringement
[Update 2: New Lawsuit] Sonos is suing Google for allegedly stealing patented speaker technology September 29, 2020 https://www.xda-developers.com/sonos-suing-google-smart-speaker-patents/