ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,505, issued on Dec. 23.

"Sleep induction device, operation method for respiratory rhythm adjustment device, and computer readable recording medium" was invented by Ayumu Shirasawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sleep induction device, wherein the control unit reads a stimulation rate that is associated with a stimulation part from a storage unit, calculates a stimulation candidate by making a shift in the stimulation rate by a predetermined amount, outputs a drive signal according to the stimulation candidate, acquires a detection time from start of output of the drive signal to detection of sleep onset by the sensor, and ca...