Inventor: Kievit, Christa
Inventor: Stewart, Ian Angus
Inventor: Oudshoorn, Herbert
Inventor: Molyneaux, William Mitchell, Forrester, Susan Glen
Inventor: Hollingsworth, Donald
Inventor: Rudolph, Nathan H.
Inventor: Carl George Klehm
Inventor: Carl George Klehm
Inventor: Carl George Klehm