Sonos has filed a lawsuit against Google alleging the infringement of its intellectual property in the latter’s smart speakers. The dispute stems from an old alliance, but now Sonos’s former partners Google and Amazon are threatening to push it out of the home audio market. But if a judge sides with Sonos, it could be a turning point for the current consumer smart home duopoly. Sonos is also claiming, according to reports in the New York Times, that Amazon infringes its patents too, but felt unable to take on two giants at once. The company, which has been in the smart speaker game since the mid-2000s, states that it shared intellectual property with Google as part of a development partnership…