Inventor: Duffett, William E.
Inventor: van der Knaap, Jacques C. M.
Inventor: Persson, Kjell-Ake
Inventor: Shoesmith, deceased, Leonard H.
Inventor: Hoek, Leendert A., Hoek, Jan
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Hellberg, Herman
Inventor: van der Jagt, Martinus
Inventor: Duffett, William E.
Inventor: Shoesmith, deceased, Leonard H.
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Duffett, William E., Mack, Grace H.
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Duffett, William E.
Inventor: Culbert, John R.
Inventor: Hesse, Peter S.
Inventor: Culbert, John R.
Inventor: Duffett, William E.
Inventor: Duffett, William E.