ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,150, issued on June 10, was assigned to Besser Co. (Alpena, Mich.).
"Hybrid mold vibration" was invented by Douglas Krentz (Alpena, Mich.), Daniel Campau (Fennville, Mich.), Alex Guzman (Alpena, Mich.) and Clay Cross (Alpena, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hybrid vibration assembly for a concrete products machine. The assembly may include a vibration frame positioned to carry at least a portion of a mold, a stationary frame carrying the vibration frame, knocker bars supportable on the stationary frame for vertical adjustment relative to the stationary frame, and a motor connected to a vibrator mounted on the vibration frame. ...