ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,419,528, issued on Sept. 23, was assigned to KL Technologies LLC (Honolulu).

"Photoplethysmography-based blood pressure monitoring device" was invented by Jeffrey Thomas Loh (Honolulu).

According to the abstract* released by the U.S. Patent & Trademark Office: "A blood pressure monitoring device includes a wrist strap, a case, and a display. The strap portion is adapted to fasten the device to the wrist without occluding blood flow. At least one sensor modality is arranged within the case for obtaining sensor data from an artery in the wrist. In a preferred embodiment photoplethysmography sensors are incorporated in the case to generate PPG waveform data. A processor within the case...