ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,735, issued on Sept. 23, was assigned to Protosafe, S.I. (Jijona, Spain).
"System for levelling ceramics" was invented by Juan Carlos Marquez Yuste (Jijona, Spain).
According to the abstract* released by the U.S. Patent & Trademark Office: "This invention refers to a one-piece ceramic-tile levelling system comprised of a base from which a longitudinally partially-threaded stem rises perpendicular to the flat surface of the base. The device also consists of a torque hood composed of a partially-threaded cylindrical orifice, to the walls of which said stem is attached in an arrangement concentric to said orifice by means of frangible connections. The stem thread and the torque hoo...