Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Van Andel, Otto Jan Robert
Inventor: Van Andel, Otto Jan Robert
Inventor: Troutner, John C.
Inventor: Herrick, Robert D.
Inventor: Franz, Lloyd W.
Inventor: Mills, Wayne J., Hampton, Katherine L.
Inventor: Hofland, G. Jack
Inventor: van Heiningen, Dirk
Inventor: Smith, George C.
Inventor: John A. Youdath
Inventor: Niedfeldt, Carl J.