ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,144, issued on April 15.
"Door security device" was invented by Sang Choon Lee (Daegu, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a self-acting door security device including a latch bolt of a locking module installed on a swinging door and engaging with a latch hole of a striker mounted on a door frame to enable the locking/unlocking the swinging door. The self-acting door security device can be easily installed in a gap between a door and a door frame to quickly detect forced opening of the door by an intruder, thereby securing personal safety. The self-acting door security device has an improved structure such that the ...