Inventor: Smulders, Marinus Johannes Maria
Inventor: van Beuningen, Hendrik Adriaan
Inventor: Princen, Wilhelmus Johannes Franciscus Antonius, Princen, Antonius Franciscus Marie Johannes
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Gutter, Martien
Inventor: Gutter, Martien
Inventor: Gutter, Martien
Inventor: Princen, Wilhelmus J. F. A., Princen, Antonius F. M. J.