Inventor: Rijnbeek, Anthonius Phillipus Maria
Inventor: Rijnbeek, Anthonius Phillipus Maria, de Jong, Kitty
Inventor: Hoekstra-Arisz, Catharina Marie
Inventor: Zonneveld, Piet
Inventor: Zonneveld, Piet Johannes Hendrikus
Inventor: de Jong, Kees C J
Inventor: de Jong, Kees C. J.