Inventor: Dekker, Adrianus
Inventor: Valstar, Oscar R.
Inventor: Valstar, Oscar R.
Inventor: van Rijn, Leonardus W. B. M.
Inventor: den Haan, Pieter
Inventor: den Haan, Pieter
Inventor: van Rijn, Magdalena J. M.
Inventor: Van Rijn, Magdalena J. M.
Inventor: van Rijn, Magdalena J. M.