ALEXANDRIA, Va., June 5 -- United States Patent no. 12,274,925, issued on April 15, was assigned to Sumitomo Rubber Industries Ltd. (Hyogo, Japan).
"Golf club" was invented by Yuki Motokawa (Kobe, Japan) and Daisuke Kohno (Kobe, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A golf club includes a head, a shaft, and a grip. The head has a center-of-gravity depth of greater than or equal to 23.5 mm. The head has a center-of-gravity distance of less than or equal to 39 mm. The shaft has a forward flex of greater than or equal to 110 mm. When f1 denotes the forward flex of the shaft and f2 denotes a backward flex of the shaft, f2/f1 may be greater than or equal to 0.8 and less than or equal to 0.9. The he...