French Patent 861,998 - Simplex

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French Patent # 861,998 - Simplex

French Patent 861,998 - Simplex main image

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Publisher: L’Institut national de la propriété industrielle
Inventor: Lucien Charles Hippolyte Juy
Country: France
Date: French application August 1939
Derailleur brands: Simplex
Derailleurs: none

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