Inventor: de Looff, Tonny M.
Inventor: de Looff, Tonny M.
Inventor: Doyle, James, Ferguson, Louise
Inventor: Blay, John William, Blay, Violet Marilyn
Inventor: Plattner, Anton
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.