Inventor: van de Pol, Peter
Inventor: Ten Have, Theodorus C. L.
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: van de Pol, Peter
Inventor: Beekenkamp, Annie Cornelia
Inventor: van de Pol, Peter
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: Madsen, Christian Hald
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: Beekenkamp, Annie Cornelia
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Madsen, Christian Hald
Inventor: van den Hoogen, Wilhelmus T. J.
Inventor: van der Meer, Paulus A. M., van der Meer, Adrianus L. M.