ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,505,728, issued on Dec. 23, was assigned to RYALEX HOLDINGS PTY LTD (Kirrawee, Australia).
"Motionless person detection system" was invented by Ron Van Veen (Kirrawee, Australia) and Ryan Van Veen (Kirrawee, Australia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A motionless person detection system has a door sensor for operably interfacing a door of an enclosed space. The system also has a motion sensor for detecting motion within the enclosed space. A controller operably interfaces the door sensor and the motion sensor. The controller is configured to reliably detect a motionless person using signals received from the door sensor and the motion sens...