ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,746,416, issued on Sept. 29.
"Escape structure" was invented by Chen Yen (Kaohsiung City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An escape structure is applied to an external wall of a building and includes at least two slide bars, a plurality of foot board units, and a surround cover unit. The slide bars are mounted to the external wall of the building, and the two slide bars are spaced from each other by a distance. The plurality of foot board units are mounted to the slide bars, and the foot board units are arranged on the two slide bars in an alternate manner. The surround cover unit surrounds the slide bars to form an escape space. ...