ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,480, issued on July 29, was assigned to KBC AIR DESIGNS LLC (Reno, Nev.).

"Dynamic particle separation for use in HVAC systems" was invented by Jeffrey E. Kirby (Reno, Nev.), Ben Barlow (Spark, Nev.) and Jace Cook (Fernley, Nev.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An air filter system for use as original equipment or conventional filter replacement in a building ventilation system includes multiple helical particle separator elements in a parallel array, each element configured to remove particles from a respective portion of contaminated inflowing air. The outflows from the separator elements are combined into a common clean air outflow ...