Inventor: Danziger, Gavriel
Inventor: Heemskerk, Harold
Inventor: Bruinen, Edward
Inventor: Bruinen, Edward
Inventor: Danziger, Gavriel
Inventor: Heinrich, Westhoff
Inventor: Spruit, Adrianus Theodorus
Inventor: Westhoff, Heinrich
Inventor: Lommerse, Henry
Inventor: Houbraken, Anna M. W. P.
Inventor: Houbraken, Anna M. W. P.
Inventor: Westhoff, Heinrich
Inventor: Houbraken, Anna M. W. P.