ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,419,604, issued on Sept. 23.
"Enhanced resolution stethoscope" was invented by Anton Issinski (Coquitlam, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stethoscope for listening low frequency sounds of a cardiovascular system, that shifts infrasound spectrum produced by moving tissues into a conventional audio spectrum range, making them available for diagnostic purposes. Methods of reading internal infrasounds include ultrasonic tissue position measurements, reconstructing tissue sounds from the Doppler frequency shift, and using electrical cardio potentials as indirect indications of internal sounds."
The patent was filed on Sept. 29, 2022...