ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,320, issued on March 17, was assigned to Karsten Manufacturing Corp. (Phoenix).

"Golf club weight attachment mechanisms and related methods" was invented by Evan R. Greer (Peoria, Ariz.), Eric J. Morales (Laveen, Ariz.), Xiaojian Chen (Phoenix), Ryan M. Stokke (Anthem, Ariz.) and Martin R. Jertson (Phoenix).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of a golf club head comprising a weight system are described herein. In some embodiments, the golf club head comprises a head body with a multi-density weight in combination with a removable weight. The multi-density weight and the removable weight act in tandem for preferred swingweighti...