Inventor: Kievit, Christa
Inventor: Kievit, Christa
Inventor: Clifton, Richard Paul
Inventor: Noodelijk, Robert
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beers, Catharina Maria
Inventor: Beekenkamp, Annie Cornelia
Inventor: Noodelijk, Robert
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beers, Martinus Petrus
Inventor: Beers, Martinus Petrus
Inventor: Stevenson, John
Inventor: van der Zwet, Alexius Johannes Joseph
Inventor: Ritchie, John Stanley, Ritchie, Kathleen Anne
Inventor: Crowther, Albert Timothy Alan, Tristram, David Ralph
Inventor: Churchus, John William
Inventor: Alexander, Pauline