Inventor: Greyvenstein, Ockert F. C.
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Maddalena, Grisenti Maria
Inventor: Membrey, Stephen, Jackson, Bryan
Inventor: Stemkens, Henricus G. W.
Inventor: Unger, Christiaan
Inventor: Meilan, Richard, Grober, Samuel