Inventor: Ault, James Robert
Inventor: Ault, James Robert
Inventor: van de Pol, Peter
Inventor: Ten Have, Theodorus C. L.
Inventor: Madsen, Christian Hald
Inventor: Jacobs, Henricus Cornelius Maria
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: Jensen, Bent Juhl
Inventor: Madsen, Christian Hald
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: van der Zwet, Alexius Joannes Joseph
Inventor: Beekenkamp, Annie Cornelia