Inventor: Damen, Petrus Thomas
Inventor: Damen, Petrus Thomas
Inventor: Stemkens, Henricus G. W.
Inventor: Stemkens, Henricus G. W.
Inventor: Stemkens, Henricus G. W.
Inventor: Stemkens, Henricus G. W.
Inventor: Talmadge, Paul A.
Inventor: Talmadge, Paul A.