ALEXANDRIA, Va., May 5 -- United States Patent no. 12,619,837, issued on May 5, was assigned to Hema (China) Co. Ltd. (Pudong New Area, China).
"Position identification method and system" was invented by Enliang Song (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A position identification method and system are provided. The position identification method is applied to a position identification system. The system includes: a power supply guide rail provided with positioning mark information, and an electronic shelf label installed on the power supply guide rail and provided with a photoelectric geminate transistor. The electronic shelf label reads corresponding positioning mark information on the po...