Inventor: Hughes, Jared Edward
Inventor: William E. Duffett, Walter W. Knicely
Inventor: William E. Duffett, Walter Knicely
Inventor: William E. Duffett, Walter Knicely
Inventor: William E. Duffett, Walter W. Knicely
Inventor: William E. Duffett, Walter W. Knicely