French Patent # 839,692 - Nivex

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French Patent # 839,692 - Nivex

French Patent 839,692 - Nivex main image

Publisher: L'Institut national de la propriété industrielle
Inventor: Pierre Gardini, Georges Trottier and René Déchanet
Country: France
Date: Priority date December 1937
Derailleur brands: Nivex
Derailleurs: Nivex (1st style), Nivex (2nd style)

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Nivex course 1938