ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,164, issued on March 18, was assigned to CASCO SIGNAL LTD. (Shanghai).

"Operation diagram-based method for automatically changing route to turn back in case of interruption" was invented by Jing Xu (Shanghai), Honghui Yan (Shanghai), Jiang Qian (Shanghai), Tingliang Zhou (Shanghai) and Juan Xie (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to an operation diagram-based method for automatically changing a route to turn back in case of interruption. The method obtains an alternative turn-back point according to the position of a fault point and the information of a line turn-back station, calculates a corresponding tu...