Sonos has long been rumored to be developing a premium set of noise-canceling headphones to join the company’s ecosystem of speakers and multiroom audio products. A new design patent filing at the German Patent and Trademark Office seems to provide a glimpse at a farther-along, more refined product than what we saw from the US Patent and Trademark Office in September. These latest filings were registered in December and published in late January.
One notable difference is that the Sonos wordmark is visible on this design; it wasn’t present on the previous filing. (That said, it’s in broken lines, which doesn’t count for much in a design patent and signifies that placement could change.) Another evolution is that the rods coming out of…