ALEXANDRIA, Va., July 28 -- United States Patent no. 12,691,339, issued on July 28, was assigned to Sumitomo Rubber Industries Ltd. (Hyogo, Japan).
"Golf club head" was invented by Yuki Shimahara (Kobe, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An iron type golf club head includes a hitting face including a plurality of score lines, a sole surface, a leading edge that constitutes a front edge of the sole surface, a trailing edge that constitutes a rear edge of the sole surface, and a score line center position that is determined based on the score lines. The sole surface includes a ridgeline that extends from a toe side to a heel side, and an additional surface that extends to traverse the ridgeli...