Inventor: de Looff, Tonny M.
Inventor: Kools, Cornelius
Inventor: de Looff, Tonny M.
Inventor: Blay, John William, Blay, Violet Marilyn
Inventor: Murray, Kenneth W.
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.
Inventor: McRae, Judith F.
Inventor: Hoff, Petrus M. M.
Inventor: Van der Salm, Gerardus C.