Inventor: Scheffers, Robertus
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Inventor: Scheffers, Robertus
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Inventor: Bak, Elly, Steur, Nicolaas D. M.
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Inventor: Bremer, Hinrich
Inventor: Troelstra, Johan
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Inventor: Head, Robert Harold, Head, Lisa Jones
Inventor: Huisman, Marinus
Inventor: Verhoef, Gijsbertus
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Inventor: Espinosa, Gavin