Inventor: Ault, James Robert
Inventor: Ault, James Robert
Inventor: Jacobs, Henricus Cornelius Maria
Inventor: Jensen, Bent Juhl
Inventor: Kristiansen, Kell
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Ault, James Robert, Thomas, Catherine S.
Inventor: Jensen, Bent Juhl
Inventor: Jensen, Bent Juhl
Inventor: Niederlander, Andreas
Inventor: Timmermans, Wilhelmus, Timmermans-Peters, Wilhelmina
Inventor: Hooijman, Aloysius A. J.
Inventor: Niederlander, Andreas
Inventor: Jensen, Bent Juhl