ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,301, issued on April 22, was assigned to Karsten Manufacturing Corp. (Phoenix).

"Golf club heads with a multi-material striking surface" was invented by James D. Willmott (Loughborough, Great Britain), Erik M. Henrikson (Phoenix), David A. Higdon (Cave Creek, Ariz.), Cole D. Brubaker (Scottsdale, Ariz.), Anthony D. Serrano (Anthem, Ariz.) and John A. Solheim (Phoenix).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of putter-type golf club head comprising a striking surface capable of achieving consistent ball speeds across the striking surface to account for various ball impact locations are described herein. The striking surface has at le...