Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Van Andel, Otto Jan Robert
Inventor: Van Andel, Otto Jan Robert
Inventor: Van Der Knaap, Henricus G. J.
Inventor: Van Der Knaap, Henricus G. J.
Inventor: Ibes, Wim J. M.
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John
Inventor: Wingerden, John Van
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John
Inventor: Wingerden, John Van
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John
Inventor: Van Wingerden, John