If they were proper partners I would think they would be working together using Google's money along with Sonos patents as a team without needing to license the

If they were proper partners I would think they would be working together using Google's money along with Sonos patents as a team without needing to license the patent except to those other than the partnership. I'm not very well informed but it looks like Google was simply an untrustworthy partner and they split up unamicably.