ALEXANDRIA, Va., March 12 -- United States Patent no. 12,247,892, issued on March 11, was assigned to Tyco Fire & Security GmbH (Neuhausen am Rheinfall, Switzerland).

"Ecoair valve with pneumatic solenoid to provide auto zero function for air velocity pressure sensor" was invented by John Scholten (Roswell, Ga.), Jon Douglas (Mequon, Wis.) and Jack A. Peterson (Brookfield, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An airflow sensor assembly for an air duct is provided. The airflow sensor assembly includes the air duct having an interior wall and an exterior wall, a high pressure pickup device, a low pressure pickup device, a pressure redirection device, and a pressure sensor. The pressure redirecti...