Inventor: Danziger, Gavriel
Inventor: Danziger, Gavriel
Inventor: Hilder, Ronald Richard
Inventor: Heinrich, Westhoff
Inventor: Hilder, Ronald Richard
Inventor: Westhoff, Heinrich
Inventor: Lommerse, Henry
Inventor: Houbraken, Anna M. W. P.
Inventor: Houbraken, Anna M. W. P.
Inventor: Westhoff, Heinrich
Inventor: Moolenaar, Alfred Nicol
Inventor: Houbraken, Anna M. W. P.