ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,457, issued on Sept. 22, was assigned to CARRIER JAPAN Corp. (Tokyo).

"Impeller" was invented by Soki Saito (Fuji, Japan), Kazuya Okura (Fuji, Japan), Masayuki Endo (Fuji, Japan), Yoshiki Tabata (Fuji, Japan) and Yoshihiro Komiyama (Fuji, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An impeller includes: a hub portion including an outer peripheral surface; and a plurality of blade portions connected to the outer peripheral surface of the hub portion. The hub portion includes: a cylindrical portion including the outer peripheral surface of the hub portion and an inner peripheral surface; a boss portion for insertion of an output shaft of an ...