Inventor: Hartgerink, Conrad
Inventor: Lammerts, Walter E.
Inventor: Jacobus, Martin
Inventor: Roberts, Stanley B.
Inventor: Dickson, A. Jr.
Inventor: Dickson, A. Jr.
Inventor: Lammerts, W. E.
Inventor: Lammerts, W. E.
Inventor: Johnston, Walter I.
Inventor: Parmentier, John