ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,453, issued on June 30, was assigned to Otis Elevator Co. (Farmington, Conn.).
"Elevator systems" was invented by Jan Ruhnke (Berlin) and Felix Benjamin Donath (Berlin).
According to the abstract* released by the U.S. Patent & Trademark Office: "An elevator system (201) includes an elevator car (203), a controller (215), a position reference system (234; 213) configured to provide a position of the elevator car (203) and at least one safety device (230) configured to indicate a potential hazard within the elevator system (201). When the actual position of the elevator car (203) cannot be determined using the position reference system (234), the controller (215) is configured to c...