see also French Patent # 982,409 - Poulain 1943

see also French Patent # 982,409 - Poulain 1943

• Publisher: L’Institut national de la propriété industrielle
• Date: Priority date June 1943
• Derailleur brands: Poulain
• Derailleurs: unknown

see also French Patent # 962,997 - Poulain 1948

see also French Patent # 962,997 - Poulain 1948

• Publisher: L’Institut national de la propriété industrielle
• Date: Priority date March 1948
• Derailleur brands: Poulain
• Derailleurs: Poulain conversion of Le Cyclo

see also Le Cycle 10/1948 - image of Poulain conversion of Le Cyclo

see also Le Cycle 10/1948 - image of Poulain conversion of Le Cyclo

• Publisher: Le Cycle
• Date: October 1948
• Derailleur brands: Poulain, Cyclo
• Derailleurs: Poulain conversion of Le Cyclo