Inventor: Scheffers, Robertus
Inventor: Scheffers, Robertus
Inventor: Bak, Elly, Steur, Nicolaas D. M.
Inventor: Noodelijk, Robert
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beekenkamp, Annie Cornelia
Inventor: Bak, Elly, Steur, Nicolaas D. M.
Inventor: Noodelijk, Robert
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Sahin-Georgiadou, Elisabeth
Inventor: Beers, Martinus Petrus
Inventor: Beers, Martinus Petrus
Inventor: Sahin, Elisabeth
Inventor: Fielding, deceased, Hervey