Inventor: van der Velden, Josephus M.
Inventor: de Looff, Tonny M.
Inventor: de Looff, Tonny M.
Inventor: Schoenmakers, Kees
Inventor: Cornelis, Daniel
Inventor: Blay, John William, Blay, Violet Marilyn
Inventor: Peterson, Robert Neal
Inventor: Peterson, Robert Neal
Inventor: Peterson, Robert Neal
Inventor: Van der Salm, Catherine Joy, Freeman, Judith Louise
Inventor: Hoff, Petrus M. M.
Inventor: Hoff, Petrus M. M.
Inventor: Hoff, Petrus M. M.
Inventor: Hoff, Petrus M. M.
Inventor: Hoff, Petrus M. M.
Inventor: Hoff, Petrus M. M.