Inventor: Sierra, Richard
Inventor: van Duijn, Jan Mark
Inventor: Hansen, Hans A.
Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Saul, Richard G.
Inventor: Nobbmann, Luder
Inventor: Crawford, James
Inventor: Van Andel, Otto Jan Robert
Inventor: vanSanden, John
Inventor: Van Andel, Otto Jan Robert