[Class : 7] Wind Turbines And Their Parts, Such As Gears, Generators, Engines, Turbines; Rotors And Rotor Blades For Wind Energy Systems And Other Wind Operated Machines[Class : 9] Apparatus And Instruments For The Production Of Energy, As Far As Contained In Class 9, In Particular Generators, Electric Circuits, Frequency Converters, Alternating Current Converters, Meas...