Inventor: van den Haak, Jelle
Inventor: van den Haak, Jelle
Inventor: van den Haak, Jelle
Inventor: Ault, James Robert
Inventor: Tonies, Hubertus Josephus
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Verschoor, Janus
Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: van Leeuwen, Jan
Inventor: Hansen, Hans A.