ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,460, issued on April 14, was assigned to EXEDY Corp. (Neyagawa, Japan).
"Propeller" was invented by Tatsuki Kitada (Neyagawa, Japan), Mitsuru Kuwahata (Neyagawa, Japan), Masahiro Ohno (Neyagawa, Japan) and Yasunori Kunisaki (Neyagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A propeller designed to prevent unintentional folding of the blades includes a hub, a blade, a first engaging portion, and a second engaging portion. The blade is attached to the hub to be radially movable with respect thereto. The blade is attached to the hub to be pivotable with respect thereto. The first engaging portion is provided in the hub. The second engagin...