ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,379,489, issued on Aug. 5, was assigned to Amazon Technologies Inc. (Seattle).
"Proximity sensing using pulsed ultrasonic signals" was invented by Vamshi Krishna Chillara (Quincy, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques for proximity-sensing devices to detect movement of a person in an environment by emitting pulsed ultrasonic signals into the environment, and detecting a change in the energy measurements of the reflections of the pulsed ultrasonic signals off the person caused by the movement of the person relative to the proximity-sensing devices. In addition to detecting movement, and thus presence, of a person, the proximity-s...