San Francisco ¨C Google has escalated a battle with Sonos Inc. over the wireless home-speaker market, filing a lawsuit that alleges patent infringement.
The conflict between the two companies, which had been collaborating on incorporating some Google features in Sonos¡¯s speakers, erupted in January when Sonos sued Google for infringing its patents.
The speaker-maker is facing increased competition from technology giants such as Google and Amazon.com Inc. that are expanding into selling internet-connected home gadgets, including less expensive wireless speakers.
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