Drives for machines used for doors, gates and moveable building and fence closures; Drives for machines used for moving closures for structures, buildings and fences, doors, gates, windows, shutter grilles, and roller blinds; transmission chains and drive belts for machines, other than for land vehicles; driving motors, other than for land vehicles; electric motors and electric engines for machines used as door and gate opening mechanisms, not for land vehicles; springs being parts of machine...