ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,236,955, issued on Feb. 25, was assigned to Amazon Technologies Inc. (Seattle).

"Accessory for a voice-controlled device" was invented by Zoe Adams (Orange County, Calif.), Pete Klein (Tustin, Calif.), Derick Deller (Capistrano Beach, Calif.), Michael John Guarniere (Redondo Beach, Calif.), Alina Chen (Huntington Beach, Calif.), Apoorv Naik (Carlsbad, Calif.), Jeremy Daniel Johnson (Mission Viejo, Calif.) and Aslan Appleman (Playa Vista, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure describes techniques and systems for encoding instructions in audio data that, when output on a speaker of a first device in an environment, cause a ...