ALEXANDRIA, Va., July 3 -- United States Patent no. 12,348,343, issued on July 1, was assigned to NXP B.V. (Eindhoven, Netherlands).
"Method and device for detecting proximity of an external RF field during ongoing RF activity of the device" was invented by Markus Wobak (Kumberg, Austria) and Erich Merlin (Gratkorn, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method is provided for detecting a proximity of a radio frequency (RF) field during an ongoing RF activity by a wireless device operating in reader mode. In the method, an input signal is modulated to provide a modulated RF signal comprising a plurality of RF modulation periods. The plurality of RF modulation periods are transmitted by the ...