US Patent Issued to Otis Elevator on July 21 for "Elevator car emergency ladder systems" (South Korean Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,596, issued on July 21, was assigned to Otis Elevator Co. (Farmington, Conn.).

"Elevator car emergency ladder systems" was invented by Jihwan Choi (Incheon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Elevator cars include a front wall panel with a car door in an opening. A storage cavity is defined within a portion of one of the front wall panel and the car door and is located behind a cab facing surface thereof. The storage cavity is defined by the cab facing surface and a side surface that defines a part of the opening when the car door is in an open state. An emergency ladder assembly is configured to be removably installed into t...