ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,777, issued on Dec. 23, was assigned to Whirlpool Corp. (Benton Harbor, Mich.).

"Systems for interchangeable knob assemblies" was invented by Alexander Robert Auer (St. Joseph, Mich.), Layna Simone Givens (Benton Harbor, Mich.), Paul J. Neuman (St. Joseph, Mich.), Pravin A. Shinde (Pune, India), Pradeep S. Thorat (Stevensville, Mich.) and Nehal Arvind Sayankar (Pune, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "A backer apparatus includes a body defining a front side for interfacing with a knob assembly and a rear side for interfacing with a cooking appliance. An inner wall extends between the front side and the rear side and includes an out...