ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,387,584, issued on Aug. 12, was assigned to Bsize Inc. (Yokohama, Japan).

"Monitoring system, monitoring method, and program" was invented by Keita Yagi (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A monitoring system (10) including: an information accumulation program (32) configured to accumulate position information of a user terminal (100) carried by a watched person, the position information being determined based on information uploaded from the user terminal; a living area determination program (33) configured to determine a living area of the watched person, based on position information accumulated in a predetermined period a...