Inventor: van der Meer, Hans
Inventor: van der Meer, Hans
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: van der Meer, Hans
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Verduin, Harrie
Inventor: Ault, James Robert
Inventor: Ault, James Robert
Inventor: van der Meer, Hans
Inventor: Verduin, Harrie
Inventor: van der Meer, Hans
Inventor: van Veen, Wilhelmus Franciscus
Inventor: Verschoor, Adrianus
Inventor: Jacobs, Henricus Cornelius Maria
Inventor: Jensen, Bent Juhl