ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,166, issued on Feb. 10, was assigned to M.U.L.E. Inc..
"Ladder trolley and related method" was invented by Bruno Ruffinengo (Dartmouth, Canada) and Michael Dennis MacDonald (Dartmouth, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ladder trolley includes a trolley frame having an upper end longitudinally spaced apart from a lower end. The trolley frame has longitudinally extending laterally spaced apart first and second side flanges; webbing connecting the first and second side flanges; and a ladder travel channel extending from the upper end to the lower end. The channel is defined by at least the first and second side flanges and the web...