Inventor: Greyvenstein, Ockert F. C.
Inventor: de Boer, Petrus
Inventor: de Boer, Petrus
Inventor: Mines, Charles, Benson, Francis
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Membrey, Stephen, Jackson, Bryan
Inventor: Chuawong, Nuanong
Inventor: Stemkens, Henricus G. W.
Inventor: Unger, Christiaan