Inventor: Ault, James Robert
Inventor: Ault, James Robert
Inventor: Jacobs, Henricus Cornelius Maria
Inventor: Jensen, Bent Juhl
Inventor: Klemm, Nils, Glawe, Martin
Inventor: Hanes, Mitchell E.
Inventor: Klemm, Nils, Glawe, Martin
Inventor: Barends, Eveline