ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,368, issued on Sept. 9, was assigned to Sumitomo Rubber Industries Ltd. (Hyogo, Japan).
"Golf club head" was invented by Seiji Hayase (Kobe, Japan) and Masahide Onuki (Kobe, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A golf club head is provided with a hollow therein and comprises a face portion, a crown portion, a sole portion, a toe and a heel. One of or each of a toe side and a heel side of the crown portion is provided with a first rigidity-decreasing part which is a groove or a slit and extends in a front-rear direction of the head."
The patent was filed on Nov. 1, 2021, under Application No. 17/516,208.
*For further information, i...