French Patent 739,662 Addition 51,212 - Simplex scan 1

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French Patent # 739,662 Addition # 51,212
scan 1 of 4

Publisher: L’Institut national de la propriété industrielle
Document: French Patent # 739,662 Addition # 51,212 - Simplex
Date: French application August 1939
Derailleur brands: Simplex
Derailleurs: Simplex Bordeaux-Paris

French Patent 739,662 Addition 51,212 - Simplex scan 1 main image