ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,177, issued on Aug. 19.
"System and method of preventing forced entry of a doorway" was invented by Leonard Wayne Greenough (Wilmington, N.C.), David Wayne Greenough (Wilmington, N.C.), Jonathan Vance Clark (Wilmington, N.C.) and Jacob Scott Clark (Wilmington, N.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention is a system that prevents the opening of a door into a room or other area by an intruder. The system includes an aperture positioned in flooring, the aperture located adjacent to a first side edge and bottom edge of a closed door. The system also includes a block comprising an internal passageway with about the same dimensions a...