An apparatus for physical exercise, and a crank device and...

An improved wheelchair

Animated riding toy

Apparatus for changing direction of driving force for bicycles

Apparatus for changing power direction for bicycle

Apparatus for changing rotation of pedal shaft for bicycle

Apparatus for changing speed of bicycles

Arrangement in a snowmobile equipped with an apparatus for...

Articulated crank for a bicycle or other crank-driven device

Attachment means for attaching a wheelchair to a motorized...

Automated bicycle transmission

Automatic derailleur shifter

Automatic derailleur shifter

Automatic speed setting system for bicycle use

Automatic speed-variating system

Automatic transmission for a bicycle and the like- pedaled...

Automatic transmission for electric bicycle

Automatic transmission having a variable drive ratio

Automatic transmission with stepless, continuously variable...

Automatic transmissions and methods therefor