Inventor: Uebelhart, Georg
Inventor: Uebelhart, Georg
Inventor: Greyvenstein, Ockert F. C.
Inventor: Hofmann, Silvia
Inventor: Oostveen, Cornelis A.
Inventor: Falstad, III, Clarence H.
Inventor: Falstad, III, Clarence H.
Inventor: van Aart, Marinus Adrianus Cornelis