Power driven snow cycle
Power driven snow cycle with self adjusting frame
Power transmission device
Power transmission device
Power transmission means with adjustable fulcrum
Power transmission system for a bicycle
Power transmission unit for a motorcycle
Power unit adapted to bicycles
Proof that calf contractions cannot augment pressure on the...
Proof that contraction of the calf cannot increase pressure...
Proof that the contraction of the calf cannot increase...
Propulsion and speed change mechanism for lever propelled...
Propulsion mechanism with two independent actuators
Propulsion system for a man powered vehicle and the like
Propulsion system for a scooter
Propulsion system for a snow going device
Propulsion unit for skiers
Pulling type driving mechanism for a vehicle