French Patent 669,030 Addition 37,905 - Simplex scan 2

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French Patent # 669,030 Addition # 37,905
scan 2 of 3

Publisher: L’Institut national de la propriété industrielle
Document: French Patent # 669,030 Addition # 37,905 - Simplex
Date: French application January 1930
Derailleur brands: Simplex
Derailleurs: Le Simplex

French Patent 669,030 Addition 37,905 - Simplex scan 2 main image