ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,452, issued on July 21, was assigned to SAMSUNG ELECTRONICS Co. Ltd. (South Korea).

"Methods and systems for polarized photoplethysmography (PPG) and biosignal analysis" was invented by Radwanul Hasan Siddique (Monrovia, Calif.) and Shailabh Kumar (Pasadena, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure is directed to a system and a method for biosignal detection, the method including emitting an electromagnetic spectral emission, including polarized light, that is reflected on a surface, collecting attributes from the reflected electromagnetic spectral emission, calculating Stokes parameters based on the collected attributes,...