ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,485,805, issued on Dec. 2, was assigned to MATSUMOTO INDUSTRY Co. LTD. (Fukuoka, Japan).

"Coupling structure between headrest stay and core member, headrest, and method for manufacturing the same" was invented by Mitsuo Shimazaki (Fukuoka, Japan) and Josei Kuriyama (Fukuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fitting groove (18) is formed in one surface of a core member (13), and an elastic deformation piece (22) is provided in an overhanging state with respect to an opening of the fitting groove (18). This makes it possible to push the upper end portion of a headrest stay (12) deep into the fitting groove (18) with the elastic force ...