ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,307, issued on April 14, was assigned to Amazon Technologies Inc. (Seattle).
"Concurrent monitoring of indoor oxygen concentration levels and human vital signs with mmWave radar sensors" was invented by Cyril Arokiaraj Arool Emmanuel (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Technologies directed to are monitoring human vital signs with mmWave radars are described. One method sends a first signal having a first chirp that is a triangular-type chirp that increases in frequency for a first period and decreases in frequency for a second period and a second chirp that is a ramp-type chirp that increases in frequency for a third p...