ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,400,478, issued on Aug. 26, was assigned to Meta Platforms Technologies LLC (Menlo Park, Calif.).
"Short range radar for face tracking" was invented by John Ho (Sunnyvale, Calif.), Jiang Zhu (Cupertino, Calif.), Wei Huang (San Diego), Boon Shiu (Palo Alto, Calif.) and Bruno Cendon Martin (Palo Alto, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A radar transmit antenna of a head mounted device transmits a transmission radar signal to a face-region. A radar receiver antenna of the head mounted device receives a return radar signal from the face-region. The return radar signal is matched to a selected expression signal included in a plurality of e...