Inventor: Stuart F. Henson
Inventor: Spencer R. Smith
Inventor: Henry W. Motzkau
Inventor: Henry W. Motzkau
Inventor: William E. Duffett, Walter W. Knicely
Inventor: Henry W. Motzkau
Inventor: Alfred N. Roberts
Inventor: Hubert B. Lewis, Helen H. Lewis
Inventor: Joseph Klupenger
Inventor: Carl Pearlstein