ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,077, issued on April 21, was assigned to PRANAQ PTE. LTD. (Taipei City, Taiwan).
"Photoplethysmogram system and method" was invented by Cheng-Yao Chen (Taipei City, Taiwan), Uei-Ming Jow (Taipei City, Taiwan) and Chih-Wei Hsu (Taipei City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A photoplethysmogram system and method are disclosed. The system includes at least three light sources of different frequencies configured to emit light into a subject's skin. A PPG sensor detects the light from the multiple light sources after it has passed through the subject's skin and generates a PPG signal for each light source. A processor, communicative...