Inventor: Madsen, Christian Hald
Inventor: Oostveen, Cornelis A.
Inventor: Falstad, III, Clarence H.
Inventor: Falstad, III, Clarence H.
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: van Aart, Marinus Adrianus Cornelis
Inventor: Zwetzig, Gretchen
Inventor: Conyers, James O.