Inventor: Greyvenstein, Ockert F. C.
Inventor: Burton, Stephen
Inventor: Ritchie, John Stanley
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Membrey, Stephen, Jackson, Bryan
Inventor: Burton, Stephen
Inventor: Stemkens, Henricus G. W.
Inventor: Unger, Christiaan