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6
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.
metal tubing for heating and air conditioning systems; metal vent cover for hvac ducts; metal fasteners, namely, bolts, nails, rivets, and screws for heating and air conditioning systems; metal pans for collecting condensation from hvac units
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7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
shaft couplings, bearings, and compressors for heating and air conditioning systems; electric motors and ignitions for heating and air conditioning systems; ball bearings for use in machines, namely, hvac units; hvac air condensors
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9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
temperature sensors, connectors for electronic circuits, electrical connection boxes, insulated copper electric wire, electric sockets, electric transformers, electric wires, electric relays, fuses, capacitors, thermostats, plastic conduit for use in electrical installations, electric switches, circuit boards; electrical components in the nature of electric contactors; control panels, namely, circuit boards
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11
Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes.
parts for heating and air conditioning systems, namely, valves, gas and electric burners, defrosting control apparatus, filters, dampers used in air ducts to regulate the flow of air, hvac blowers, ventilation fans, hvac motor mounts, return air filters, pumps, humidifiers, and dryers for hvac units; hvac blower replacement kits consisting of hvac blowers and structural parts therefore; plumbing fittings for hvac units, namely, drains, valves, and couplers; flexible pipes for hvac units; spark igniters for gas furnaces