Inventor: Danziger, Gavriel
Inventor: Scheffers, Robertus
Inventor: Scheffers, Robertus
Inventor: Bak, Elly, Steur, Nicolaas D. M.
Inventor: Bak, Elly, Steur, Nicolaas D. M.
Inventor: Danziger, Gavriel
Inventor: Unger, Christiaan
Inventor: Heinrich, Westhoff
Inventor: Doyle, Alice J.
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.