Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: Clifton, Richard Paul
Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Van Andel, Otto Jan Robert
Inventor: van der Zwet, Alexius Johannes Joseph
Inventor: Van Andel, Otto Jan Robert
Inventor: Crowther, Albert Timothy Alan, Tristram, David Ralph
Inventor: Churchus, John William
Inventor: Alexander, Pauline
Inventor: Herrick, Robert D.
Inventor: Mills, Wayne J., Hampton, Katherine L.
Inventor: Hofland, G. Jack
Inventor: Niedfeldt, Carl J.