Sailplanes; All-terrain wheelchairs; All-terrain wheelchairs for use in the sand, use at the beach; Armrests for wheelchairs; Electric wheelchairs; Electrically operated wheelchairs; Motor scooters and structural parts therefor; Power transfer seats for vehicles to provide easier ingress to and egress from a vehicle for disabled or mobility impaired people; Powered stand-up wheelchairs; Standing wheelchairs; Steering wheel attachment comprised of an electric motor and drive gear and a ring gear that when activated by an external controller, turns the steering wheel to effect automatic vehicle steering in straight or curved paths; Wheel chairs; Wheelchair pads