Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: Holtmaat, Henricus Maria Joseph
Inventor: Holtmaat, Henricus Maria Joseph
Inventor: Oostveen, Cornelis A.
Inventor: Falstad, III, Clarence H.
Inventor: Falstad, III, Clarence H.
Inventor: van Aart, Marinus Adrianus Cornelis