ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,321, issued on Sept. 8, was assigned to Karsten Manufacturing Corp. (Phoenix).
"Golf club head with lightweight shaft-receiving structure" was invented by Travis D. Milleman (Cave Creek, Ariz.), Joshua B. Matthews (Chino Hills, Calif.) and Eric J. Morales (Laveen, Ariz.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A golf club head with a lightweight shaft-receiving structure is described herein. The lightweight shaft-receiving structure comprises one or more lightweight components provided in low-stress areas of the club head, wherein the lightweight components form portions of the shaft-receiving structure that would otherwise be formed by higher...