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US Patent # 5,380,253

Inventor: Yoshihisa Iwasaki

Assigned to: SunTour

US application filed: March 1993

Japanese application filed: March 1992

Relates to: SunTour S-1

US_Patent_5,445,567_-_AutoBike_SmartShift.html
US_Patent_5,295,916_-_AutoBike_SmartShift.html