ALEXANDRIA, Va., April 9 -- United States Patent no. 12,270,248, issued on April 8.
"Pet access tunnel and method of installation" was invented by Marc Pentecost (Valparaiso, Ind.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pet access tunnel and method of installing a pet access tunnel in and through interior walls of a building structure. The pet access tunnel includes a first interior flange configured to be installed in a wall opening through the wall at a first side of the wall, a second interior flange configured to be installed in the wall opening through the wall at a second side of the wall, a first door flange configured to be installed in the central opening of the first interior flange, a sec...