French Patent # 782,338 - Mercier

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French Patent # 782,338 - Mercier

French Patent 782,388 - Mercier main image

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Publisher: L’Institut national de la propriété industrielle
Inventor: Établissements Mercier
Country: France
Date: Priority date December 1934?
Derailleur brands: Mercier
Derailleurs: Mercier Super-Valor

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