ALEXANDRIA, Va., March 17 -- United States Patent no. 12,578,111, issued on March 17, was assigned to Tyco Fire & Security GmbH (Neuhausen am Rheinfall, Switzerland).

"Heating, ventilation, and/or air conditioning system fault log management systems" was invented by Brian D. Rigg (Douglass, Kan.) and Shaun B. Atchison (Overland Park, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A control system for a heating, ventilation, and/or air conditioning (HVAC) system includes control circuitry having a storage device and a microcontroller. The storage device is configured to store faults. The microcontroller is configured to monitor for a condition of the HVAC system associated with a fault, store a fault in ...