ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,923, issued on April 22, was assigned to BELIMO HOLDING AG (Hinwil, Switzerland).

"System and method for measuring a flow of gas through a channel" was invented by Patrick Reissner (Herrliberg, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "An HVAC flow measurement system (1) comprises an ultrasonic flowmeter (10) for measuring a flow of gas through a channel (2). The ultrasonic flowmeter (10) comprises ultrasonic transducers (11, 12) arranged at a distance from each other in flow direction (f). The ultrasonic transducers (11, 12) are configured to emit an ultrasonic pulse into the channel (2) and to receive an ultrasonic pulse in the cha...