ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,557,997, issued on Feb. 24, was assigned to The Board of Trustees of the Leland Stanford Junior University (Stanford, Calif.).

"Proximity sensor circuits and related sensing methods" was invented by Xina Quan (Saratoga, Calif.), Zhenan Bao (Stanford, Calif.) and Amanda Nguyen (Stanford, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Various embodiments include an apparatus and methods of use of a proximity sensor. An example apparatus includes a transducer circuit having a sensor circuit, the sensor circuit including an electrode, an electrical-signal sensing circuit, a substrate to support and at least partially enclose the transducer circuit an...