Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Vinson, Peter Edward
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: de Jongh, Johannes Adrianus Petrus
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Madsen, Christian Hald
Inventor: Speichert, C. Greg
Inventor: Harnett, Richard Frederick
Inventor: Bittner, Walter