Inventor: Heemskerk, Harold
Inventor: Bruinen, Edward
Inventor: Bruinen, Edward
Inventor: Oudshoorn, Hubertus Gerardus
Inventor: de Looff, Tonny M.
Inventor: de Looff, Tonny M.
Inventor: Degenhardt, Dick
Inventor: Spruit, Adrianus Theodorus
Inventor: Blay, John William, Blay, Violet Marilyn
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.
Inventor: Hoff, Petrus M. M.