Hovercraft; Hydroplanes; Autonomous underwater vehicles for seabed inspections; Gear changing mechanisms for land and water vehicles; Hydrofoils being boats; Motorized vehicles, namely, underwater diver propulsion vehicles; Motorized, electric-powered, self-propelled, self-balancing, wheeled personal mobility, transportation device; Non-motorized push scooters; Push scooters and structural parts therefor; Remotely operated vehicles for underwater inspections; Screw-propellers for boats; Screw...