ALEXANDRIA, Va., June 6 -- United States Patent no. 12,283,262, issued on April 22, was assigned to Tyco Fire & Security GmbH (Neuhausen am Rheinfall, Switzerland).

"Tunable silencer for air handling unit" was invented by Rajavel Balaguru (New Cumberland, Pa.), Paul F. Bauch (York, Pa.) and Roger Lee Howard (Seven Valleys, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A silencer module for an air handling unit includes a first baffle and a second baffle spaced apart from the first baffle to form an air channel between the first baffle and the second baffle. The air channel is configured to receive a fluid flow and direct the fluid flow through the silencer module. The silencer module also includes a rea...