Inventor: Greyvenstein, Ockert F. C.
Inventor: Stemkens, Henricus Godefridus Wilhelmus
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Inventor: Dekker, Adrianus
Inventor: Stemkens, Henricus G. W.
Inventor: Hambali, Gregori G.
Inventor: Hambali, Gregori Garnadi, Knauss, Marianne E.
Inventor: Unger, Christiaan