ALEXANDRIA, Va., March 31 -- United States Patent no. 12,588,841, issued on March 31, was assigned to VIAVI SOLUTIONS INC. (Chandler, Ariz.).
"Calibration-free pulse oximetry" was invented by Lan Sun (Santa Rosa, Calif.), Chang Meng Hsiung (Redwood City, Calif.) and Babs Soller (Carlsbad, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device may identify a peak timestamp and a trough timestamp based on a first principal component of photoplethysmography (PPG) data associated with a plurality of wavelength channels. The device may generate a peak absorption spectrum based on the peak timestamp and the PPG data, and may generate a trough absorption spectrum based on the trough timestamp and the PPG da...