ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,956, issued on April 22, was assigned to TOKYO SEIMITSU Co. LTD. (Tokyo).
"Automatic balancer" was invented by Kelvin Woltring (Portland, Ore.), William Kernan (Portland, Ore.), Joseph Canfield (Portland, Ore.) and Jeremy Rose (Portland, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An automatic balancer comprising: a balance head configured to rotate integrally with a rotating body around a rotation axis of the rotating body, the balance head including a balance correction mechanism configured to correct imbalance of the rotating body, and a case having a cylindrical outer peripheral surface parallel to the rotation axis and configured to hous...