Elastic joint derailleur
Elastomer coated coil spring and chain derailleur employing same
Electrically operated derailleur that re-engages a...
Electrically operated derailleur with a power storing mechanism
Electrically operated derailleur with force overload protection
Electrically operated derailleur with power storing mechanism
Electro-motive gear-shift control apparatus for bicycles
Electromechanical bicycle gear shift mechanism
Electromechanical bicycle transmission
Electronic bicycle derailleur control apparatus