Inventor: de Ruiter, Hendrik Marinus
Inventor: Smith, Donald Robert
Inventor: Smith, Donald Robert
Inventor: de Looff, Tonny M.
Inventor: de Looff, Tonny M.
Inventor: Oudshoorn, Hubertus Gerardus
Inventor: Smith, Donald Robert
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.