ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,463, issued on July 21, was assigned to SUREPULSE MEDICAL Ltd. (Derbyshire, Great Britain).

"PPG measurement" was invented by Barrie Hayes-Gill (Derby, Great Britain) and James Carpenter (Derby, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device is disclosed comprising: an optical physiological sensor and a further measurement system. The optical physiological sensor comprises a light emitter and a light detector configured to detect the light from the light emitter after it has been attenuated by tissue comprising blood vessels. The optical physiological sensor is configured to determine the value of a physiological parameter fro...