Inventor: Greyvenstein, Ockert F. C.
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Inventor: Freyre, Rosanna
Inventor: Freyre, Rosanna
Inventor: Stemkens, Henricus Godefridus Wilhelmus
Inventor: Membrey, Stephen, Jackson, Bryan
Inventor: Stemkens, Henricus G. W.
Inventor: van der Velden, Josephus Maria
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