ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,122, issued on June 24.

"Passive combined indoor positioning system and method based on intelligent terminal sensor" was invented by Zengke Li (Xuzhou, China), Kefan Shao (Xuzhou, China), Shiyi Jing (Xuzhou, China), Yanlong Liu (Xuzhou, China), Qi Wu (Xuzhou, China), Ao Liu (Xuzhou, China) and Xingyu Ding (Xuzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A passive combined indoor positioning system and method based on an intelligent terminal sensor, and is applied to the technical field of real-time positioning, can include a data collection module, a dead reckoning module, a geomagnetic matching determining module, a single-point matchi...