ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,256, issued on Aug. 11.
"Plumbing vent plug" was invented by Martin Henry Schmidt (Kippen, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A roof vent capping device that is configured to sealably secured to an opening of a roof vent pipe so as to facilitate a pressure test of a plumbing network. The present invention is configured to be removed from the roof vent pipe from a distal location ensuing the pressure test. The roof vent capping device includes a cap member wherein the cap member has an upper portion and a lower portion. The lower portion has a diameter configured to be inserted into the opening of a roof vent pipe and provide a her...