ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,901, issued on Oct. 7, was assigned to Price Industries Ltd. (Winnipeg, Canada).
"Critical area recirculation and exhaust system" was invented by Ethan Conrad Davis (Winnipeg, Canada), Jordan Ashley Rose Enns (Winnipeg, Canada) and David Surminski (Winnipeg, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A critical area recirculation and exhaust system for a room operates in a normal operating mode where fresh air is delivered from an air handler through a diffuser and returned to the air handler through a room return duct. In a selected isolation operating mode, a fan filter unit is activated to draw contaminated air from the room through one...