See also derailleurs from the 1920s

Browse the scanned material by year:

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1920

1921

1. Cycles de Route & Grande Tourisme “Le Chemineau”?
   

2. Système “Le Chemineau”?
   

1922

1. US trademark # 979,870 - SunTour
   

1923

1924

1925

1926

1. US trademark # 577,839 - Cyclo Gear Company
   

1927

1928

1929

1. Czech Trademark # 97,274 - Walter
   

2. Czech Trademark # 97,275 - Walter
   

3. French patent # 669,030 - Le Simplex
   

4. French patent # 669,030 addition # 37,231 - Le Simplex
   

5. US trademark # 575,781 - Simplex