On August 2nd, 1892 George A. Wheeler, of New York City, patented ideas for the first practical moving staircase, though it was never built - This Day in Patent History

PatentYogi_This Day in Patent History_Aug 02

Patent Information
Publication number: US479864 A
Patent Title: Elevator
Publication type: Grant
Publication date: Aug 2, 1892
Filing date: Mar 5, 1891
Inventors: George A. Wheeler