ALEXANDRIA, Va., July 23 -- United States Patent no. 12,366,597, issued on July 22, was assigned to HUNAN SMALL QUICK SMART ELECTRONIC TECHNOLOGY Co. LTD. (Shaoyang, China).

"Grounding impedance measuring circuit and grounding impedance measuring method" was invented by Xiu Lian Li (Shaoyang, China) and Shi Jun Jiang (Shaoyang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a grounding impedance measurement circuit and a grounding impedance measurement method. The grounding impedance measurement circuit detects a power supply voltage of an isolated alternating current power supply by means of disposing a power supply voltage detection circuit between a live wire and a neutral wire at the i...