ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,376,534, issued on Aug. 5, was assigned to The Toro Co. (Bloomington, Minn.).
"Stump grinder with grinding arm and control" was invented by Joseph C. Knipp (Elko, Minn.), Christopher J. Kost (North Mankato, Minn.), David A. Murray (Eagan, Minn.), Landon M. Aldinger (Iowa Falls, Iowa) and John P. Azure (Bloomington, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stump grinder has a grinding arm that durably mounts a rotatable grinding wheel by securing the drive shaft of a motor to the grinding wheel such that a pair of bearings within the motor support one side of the grinding wheel and by supporting the other side of the grinding wheel with a st...