French Patent 1,319,997 Addition 87,074 - Simplex

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French Patent # 1,319,997 Addition # 87,074 - Simplex

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Publisher: L’Institut national de la propriété industrielle
Inventor: Lucien, Charles, Hippolyte Juy
Country: France
Date: French application December 1964
Derailleur brands: Simplex
Derailleurs: Simplex Criterium (537)

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