ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,470, issued on May 26, was assigned to Arctevity Inc. (Woburn, Mass.).
"Digital air flow detection in a duct" was invented by Michael Burka (Winchester, Mass.), Alex Seiger (Manchester, N.H.), Christopher Egan (Concord, N.H.), Charlie Landino (Westford, Mass.) and Robert Seliger (Beverly, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A digital air flow detector that includes a pair of thermistors contained in a probe. When installed, an external thermistor is positioned in an air stream, while an insulated thermistor is not. When air is flowing, the air stream will change the temperature of the first thermistor more than the second thermistor....