Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Van Andel, Otto Jan Robert
Inventor: Van Andel, Otto Jan Robert
Inventor: LeBoutillier, Roberts
Inventor: Herrick, Robert D.
Inventor: Mills, Wayne J., Hampton, Katherine L.
Inventor: Hofland, G. Jack
Inventor: Fritz A. Henderickx
Inventor: Richard M. Wyman, Jr.
Inventor: Hess, Cornelius W. M.
Inventor: Henderickx, Fritz A.
Inventor: Russell, Ethel S.
Inventor: Niedfeldt, Carl J.