see also French Patent # 1,021,893 - Cervino 1949

see also French Patent # 1,021,893 - Cervino 1949

• Publisher: L'Institut national de la propriété industrielle
• Date: Priority date December 1949
• Derailleur brands: Cervino, patent sold to Altenburger
• Derailleurs: unknown

see also German Patent # 858,934 - Altenburger 1951

see also German Patent # 858,934 - Altenburger 1951

• Publisher: Deutsches Patent- und Markenamt
• Date: Priority date June 1951
• Derailleur brands: Altenburger, development of a Cervino design
• Derailleurs: Altenburger S-O