Inventor: Ault, James Robert
Inventor: Ault, James Robert
Inventor: Jacobs, Henricus Cornelius Maria
Inventor: Jensen, Bent Juhl
Inventor: Scheffers, Robertus
Inventor: Scheffers, Robertus
Inventor: Bak, Elly, Steur, Nicolaas D. M.
Inventor: Kristiansen, Kell
Inventor: Beekenkamp, Annie Cornelia
Inventor: Bernuetz, Andrew
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Ault, James Robert, Thomas, Catherine S.
Inventor: Danziger, Gavriel
Inventor: Jensen, Bent Juhl
Inventor: Jensen, Bent Juhl
Inventor: Bak, Elly, Steur, Nicolaas D. M.
Inventor: Bernuetz, Andrew