Inventor: van Langen, Gerard
Inventor: van Langen, Gerard
Inventor: van Langen, Gerard
Inventor: Smit, Obed Jacob
Inventor: Smit, Obed Jacob
Inventor: Ceballos, Matias Eduardo Avendano
Inventor: Oostveen, Cornelis A.
Inventor: Falstad, III, Clarence H.
Inventor: Falstad, III, Clarence H.