This patent covers the design of the Super-Leader Competition, a single pulley, direct-pull, racing derailleur. It was very nicely finished and had a somewhat mysterious and slightly extravagant spring arrangement.

• Publisher: L'Institut national de la propriété industrielle
• Inventor: Charles Gautherot
• Country: France
• Date: Priority date May 1950
• Derailleur brands: Super-Leader
• Derailleurs: Super-Leader Compétition