ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,518, issued on April 22, was assigned to AADG INC. (New Haven, Conn.).
"Composite door systems" was invented by Daniel Brian Glover (Franklin, Tenn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Composite door systems are provided for use in a protective barrier structure. The composite door systems provide for quick assembly, safety, security, and resistance to physical impacts or threats. The composite door systems may include a shell and a core that can be factory completed or finished on site. The shell may be shipped to the assembly location of the barrier structure, and the core may be formed on site by pouring liquid fill material into a cavi...