ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,530,638, issued on Jan. 20, was assigned to CHENGDU QINCHUAN IOT TECHNOLOGY Co. LTD. (Chengdu, China).

"Method and system for scheduling operation and maintenance personnel based on internet of things (IoT) system for smart gas installation management" was invented by Zehua Shao (Chengdu, China), Junyan Zhou (Chengdu, China), Xiaojun Wei (Chengdu, China), Lei Zhang (Chengdu, China), Yong Li (Chengdu, China) and Yongzeng Liang (Chengdu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The embodiments of the present disclosure provide methods and systems for scheduling operation and maintenance personnel based on an Internet of Things (IoT) system for...