ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,536,398, issued on Jan. 27, was assigned to Hand Held Products Inc. (Charlotte, N.C.).

"Method and apparatus for fault diagnosis in an RFID system" was invented by Gourango Lal Biswas (Charlotte, N.C.) and Pankaj Kumar Pandey (Charlotte, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods, apparatuses and systems for an RFID system are disclosed herein. An example system may include one or more of antennas, each antenna including an RF power comparator for comparing the power level indicator of the RF signal of the antenna with an RF signal power threshold, a bias voltage comparator for comparing a bias voltage of the antenna with a bias voltage...