Inventor: van Rijn, Magdalena J. M.
Inventor: Pouw, Antonius A.
Inventor: Akerboom, Petrus J.
Inventor: Heemskerk, Gerard J. C. M.
Inventor: Akerboom, Petrus J.
Inventor: Akerboom, Petrus J.
Inventor: Bak, Gerardus J., Steur, Nicolaas D.
Inventor: Kuiken, Kwekerij Jan