Mechanical power transmission systems; gears and gear boxes; gears and gear boxes for boats and vessels; geared motors; machinery and tools for manufacturing gears and gear boxes; screw jacks; lifting apparatus; mechanical and fluid couplings; mechanical and fluid couplings for boats and vessels; mechanical actuators; electric motors; motors for boats and vessels including electric motors; hydraulic apparatus and machines; hydraulic motors; hydraulic pumps; hydraulic valves; hydraulic control...