Inventor: van Langen, Gerard
Inventor: van Langen, Gerard
Inventor: van Langen, Gerard
Inventor: van der Velden, Sjef
Inventor: van der Velden, Sjef
Inventor: Smit, Obed Jacob
Inventor: Smit, Obed Jacob
Inventor: Ceballos, Matias Eduardo Avendano
Inventor: Atchison, James K
Inventor: Dobres, Michael S.
Inventor: Verhoef, Gijsbertus
Inventor: Kraan, Kees Jan