Speaker Pioneer Sonos Fighting Google in ‘Golden Age of Audio’

Sonos Inc. became a favorite with audiophiles by selling sleek, wireless speakers for streaming music long before technology titans such as Alphabet Inc.’s Google entered the market with cheaper, internet-connected models.

Now Sonos is hoping a U.S. trade judge finds Friday that its partner turned foe, Google, infringed its patents for multiroom audio systems. Sonos is asking U.S. International Trade Commission Judge Charles Bullock to support its bid to block imports of Google’s Home and Chromecast systems and Pixel phones and laptops, which are made in China.

“Google has thrown everything at us in this case, but we believe ...