French Patent 834,697 Addition 49,437 - Simplex scan 1

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French Patent # 834,697 Addition # 49,437
scan 1 of 3

Publisher: L’Institut national de la propriété industrielle
Document: French Patent # 834,697 Addition # 49,437 - Simplex
Date: French application May 1938
Derailleur brands: Simplex
Derailleurs: none

French Patent 834,697 Addition 49,437 scan 1 - Simplex main image