ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,403, issued on March 3, was assigned to INVENTIO AG (Hergiswil, Switzerland).

"Elevator system with simplified power supply for shaft door assemblies" was invented by Erich Butler (Ebikon, Switzerland), Christoph Liebetrau (Menziken, Switzerland), Romeo Lo Jacono (Gravesano, Switzerland) and Valerio Villa (Colverde, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "An elevator system has a rail system and a shaft door assembly on each of a plurality of floors of a building. The rail system has an electrically conductive guide rail that extends along the plurality of floors and guides a vertically movable component of the elevator system, and an e...