ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,537,583, issued on Jan. 27, was assigned to SEIKO EPSON Corp. (Tokyo).
"Responder and positioning system" was invented by Kimio Nagasaka (Hokuto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A responder that receives an interrogation wave from an interrogator and transmits a response wave to the interrogator includes a plurality of antennae receiving the interrogation wave, a reference signal generator generating a reference signal, a plurality of modems outputting quadrature phase amplitudes based on reception signals output from the antennae when the interrogation wave is received and the reference signal, a parallel-time-series signal convert...