Inventor: Verhoef, Gijsbertus
Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Burton, Stephen
Inventor: Durand, James Richard
Inventor: Zlesak, David Charles
Inventor: Ritchie, John Stanley
Inventor: Schuurbiers, Marinus Martinus Hendrikus
Inventor: Burton, Stephen
Inventor: Wood, Timothy D.
Inventor: Tuite, Jonathan
Inventor: Burton, Stephen
Inventor: Pellett, Harold M.