Inventor: Dykstra, Cornelius J.
Inventor: Gilbert, Elon J.
Inventor: Hamilton, John Duncan Sr.
Inventor: Frazier, Loran R., Jenkins, Philip J.
Inventor: Barker, Elery R.
Inventor: Lemcke-Tieton, Robert S.
Inventor: Brauns, Edward B.
Inventor: Pettingill, Clark