US Patent Issued to Karsten Manufacturing on Dec. 9 for "Iron-type golf club head with rear opening and insert" (Arizona Inventors)

ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,416, issued on Dec. 9, was assigned to Karsten Manufacturing Corp. (Phoenix).

"Iron-type golf club head with rear opening and insert" was invented by Clayson C. Spackman (Scottsdale, Ariz.), Matthew W. Simone (Phoenix) and Cory S. Bacon (Scottsdale, Ariz.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Described herein are embodiments of an iron-type golf club head comprising a rear opening and an insert. The insert either partially or fully occupies the club head interior cavity. The insert damps vibrations occurring within the club head at impact to provide a desirable sound and feel. The insert is formed of a low-density material, thereby providing...