Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Freyre, Rosanna
Inventor: Freyre, Rosanna
Inventor: Sakazaki, Ushio
Inventor: Sakazaki, Ushio
Inventor: Van Andel, Otto Jan Robert
Inventor: Freyre, Rosanna
Inventor: Freyre, Rosanna
Inventor: Van Andel, Otto Jan Robert
Inventor: Grunewald, Theodorus P. M.
Inventor: Grunewald, Theodorus P. M.
Inventor: Grunewald, Theodorus P. M.
Inventor: Grunewald, Theodorus P. M.