Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: Koning, Lammert
Inventor: van den Burg, Gerardus Pieter
Inventor: Stemkens, Henricus G. W.
Inventor: Enthoven, Adrianus W. M.