Inventor: ter Laak, Wendela Antoinette
Inventor: Koppe, Lubbertus H.
Inventor: ter Laak, Wendela Antoinette
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Beekenkamp, Annie Cornelia
Inventor: Palmer, Irene E.
Inventor: Johnson, Jr., Ozzie W.
Inventor: Holtmaat, Henricus Maria Joseph
Inventor: Holtmaat, Henricus Maria Joseph
Inventor: Holtmaat, Henricus Maria Joseph
Inventor: Bisschop, Elisabeth
Inventor: Bisschop, Elisabeth
Inventor: Bisschop, Elisabeth