ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,176, issued on May 12.
"Filter changing notification system" was invented by Melvin Earl Fields (Myrtle Beach, S.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A filter change notification system is disclosed for use in filtration equipment, including HVAC systems. The system includes a substantially flat, rigid filter mounted on a movable filter tray configured to transition between closed and open positions. The tray includes an airflow opening permitting continued air passage while the filter is installed. The tray is electrically coupled to a filter ejection system comprising a determining component operative to identify a filter-change interv...