ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,424,336, issued on Sept. 23, was assigned to THE SECOND RESEARCH INSTITUTE OF CAAC (Chengdu, China).

"Method, device and system for tracking potential infected persons in public place during epidemic period" was invented by Qian Luo (Chengdu, China), Wanli Dang (Chengdu, China), Xiao Luo (Chengdu, China), Rui Deng (Chengdu, China), Long Geng (Chengdu, China), Ye Pan (Chengdu, China), Zaoxin Chen (Chengdu, China) and Ergai Yu (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a method, device and system for tracking potential infected persons in a public place during an epidemic period. The method comprises: determining, accord...