Metal air conditioning ducts; metal heating ducts; metal vent covers for HVAC ducts; ventilating ducts of metal and structural parts therefor; metal expansion joints for piping and ducting

Generators of electricity; solar powered electricity generators; wind powered generators of electricity; windmills; wind turbines and structural parts therefor; generators for wind turbines

Solar cells; Apparatus for converting electronic radiation to electrical energy, namely, photovoltaic solar modules

Solar collectors; Propellers for wind powered generators; Dampers, namely, control devices used in air ducts to regulate the flow of air