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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.
noise control ventilating ducts of made of metal; metal structural members for noise insulated rooms, namely, panels, connecting corners and joints, doors, and windows
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11
Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes.
air-conditioning apparatus, and replacement parts and fittings therefor
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16
Paper, cardboard and goods made from these materials, not included in other classes; printed matter; bookbinding material; photographs; stationery; adhesives for stationery or household purposes; artists' materials; paint brushes; typewriters and office requisites (except furniture); instructional and teaching material (except apparatus); plastic materials for packaging (not included in other classes); printers' type; printing blocks.
printed matter-namely, data sheets, technical bulletins and reproductions of drawings, relating to noise control and acoustics
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17
Rubber, gutta-percha, gum, asbestos, mica and goods made from these materials and not included in other classes; plastics in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, not of metal.
architectural acoustic products, namely, sound attenuators and diffusers, and prefabricated sound elimination ducts which eliminate noise from air conditioning and ventilating systems; sound absorptive materials for soundproofing of buildings and rooms, parts and fittings therefor; acoustic-thermal insulated housings for air handling equipment and plenums
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40
Treatment of materials
custom building of air conditioning apparatus and sound attenuators and diffusers
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42
Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software
technical support services, namely, troubleshooting in the nature of diagnosing problems with air conditioning apparatus and sound attenuators and diffusers