ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,752, issued on March 31, was assigned to Whirlpool Corp. (Benton Harbor, Mich.).
"Ladder assembly" was invented by Marcel Bogger Lessa (Joinville, Brazil), Dayabhushan Shankarrao Thorat (Pune, India) and Selina Haque (Berkley, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ladder assembly for a door of a refrigeration unit includes a support ladder that includes a retention hook and defines a plurality of mounting apertures distributed along a length of the support ladder and a plurality of slots, a plurality of resilient snaps respectively received within the plurality of slots, and a ladder cover that defines a plurality of apertures. The...