Powered shopping cart and trailer

Powered trailer to propel a two wheeled vehicle

Preassembly unit for the drive of an industrial truck

Rear-drive, ride-on tractor propulsion unit for articulation wit

Remote controlled and motorized baby walker

Removable vehicle chassis sub-frame with engine

Reverse drive mechanism for wheeled devices

Safety control for baby's walker

Self propelled pallet truck

Self-propelled steering device for trailers

Steerable drive unit for transporter

Steerable wheelchair attachment with powered coupling means

Tag axle for sub-frame of heavy duty truck power module

Tow vehicle system

Tractor unit for implements and vehicles

Tractor vehicle structural arrangement that minimizes vibration

Trailer dolly apparatus

Trailer drive apparatus

Trailer driver

Trailer maneuvering jack with a compact drive wheel