| 3M |
| Academy Electric |
| Accent Lighting |
| Acme Dunbar |
| Acme Electric |
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| Advance Lighting Concepts |
| Advance Transformer |
| Airey-Thompson |
| Airmaster Fan Company |
| Alcan Cable |
| Alflex |
| Alko |
| Allied Tube & Conduit |
| ALP Lighting & Ceiling Products |
| Alpha Wire |
| Alwalt Manufacturing (Circle AW) |
| Amerace |
| American Electric |
| American Flexible Conduit Company |
| American Polywater |
| American Saw & Manufacturing |
| Amprobe |
| Anaconda Metal Hose |
| Anamet |
| Anderson |
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| Architectural Area Lighting |
| Area Lighting Research |
| Atmos Dimming |
| B & G Automated Systems |
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| Baldor |
| Banner |
| Beckman Instruments |
| Beha Instruments |
| Belden |
| Bell |
| Benjamin Prod-Thomas Industries |
| W.A. Benjamin |
| BetaLED |
| Biddle Instruments |
| Bieber Lighting |
| Big Beam |
| Blackburn |
| Bodine |
| Bowers Manufacturing |
| Brad Harrison |
| Brady |
| Brand Rex |
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| Bright Star Industries |
| BRK |
| Broan |
| Brooks Products |
| Bryant |
| Buchanan |
| Burbank Electric Products |
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| Caddy (Erico) |
| Cal Pipe |
| Calpico |
| Campbell Chain |
| Canada Wire |
| Capri |
| Carlon |
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| Carolina Galvanizing |
| Cerro Wire |
| Certainteed |
| Chalfant Manufacturing Company |
| Chase-Shawmut |
| Chelsea Fan & Blower |
| Chloride Systems |
| Chromolox |
| Circle AW |
| Cobra Wire & Cable |
| Cole Lighting |
| Coleman Cable Systems |
| Columbia Cable & Electronics |
| Columbia Lighting |
| Conduflor |
| Conduit Pipe Products |
| Continental Wire |
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| T.J. Cope |
| Copperweld Industries |
| Cornish Wire |
| CRC |
| Crescent/Stonco |
| Crouse-Hinds |
| Crystal Lighting |
| Cully |
| Curlee |
| Cutler Hammer (Eaton) |
| Dabbco Lighting |
| Daykin Electric |
| Dazor |
| Devine Lighting |
| Diamond Expansion Bolt |
| Dongan |
| Dossert |
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| Dual-Lite Emergency Lighting |
| Dura Electric |
| Duracell |
| Durant Tool |
| Dutch Brand |
| Eagle Electric |
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| Modicon |
| Moldcast |
| Mueller |
| Myers Hubs |
| Namco Controls |
| Naylon Electric |
| Nelson Electric |
| Norelco (Phillips) |
| North Star Lighting |
| NSi |
| Nutone |
| Okonite |
| Omni Cable |
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| O-Z/Gedney |
| Pacific Electricord |
| Pacific Southwest Sales |
| Pacific Union Metal Company (Pumco) |
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| Paragon Electric Company |
| Paranite Wire & Cable |
| Pass & Seymour |
| Penn-Union |
| Perfect-Line Manufacturing |
| Perfectlite Company |
| Perma Power Electronics |
| Philips Emergency Lighting |
| Philips Lamps (Norelco-Westinghouse) |
| Phillips Gardco |
| Phoenix Products |
| Picoma |
| Pirelli Cable |
| Plymouth Rubber |
| Porcelain Products |
| Precision Multiple Controls |
| Prescolite |
| Progress Lighting |
| PW Western |
| RAB Lighting |
| Raco |
| Ray-O-Vac |
| Red Dot |
| Remee |
| Rite-O-Lite |
| Robroy Industries |
| Rockbestos Surprenant Cable Corporation |
| Rodale Manufacturing |
| Roxtec |
| RTC Ballasts |
| Russellstoll |
| S & C Electric |
| Safe-T-Cote |
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| Selecta Switch |
| Seth Thomas |
| SGL Waber |
| Shat-R-Shield |
| Siemens-ITE |
| SLI |
| SolaHD |
| Southwire |
| Spaulding Lighting |
| Spero Lighting |
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| Stahl |
| Stahlin |
| Star Expansion Company |
| Steel City |
| Sterner Lighting |
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| Struthers-Dunn |
| Superstrut |
| Supreme Lighting |
| Swivelier |
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| Teledyne Big Beam |
| Telemecanique |
| Thermador |
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| Thomas Lighting |
| TIF Instruments |
| Tivoli |
| Tork Time Controls |
| Touchplate |
| Triad |
| Triangle PWC |
| Turck |
| Tyco Electronics |
| Union Carbide (Eveready) |
| Unistrut |
| United Copper Industries |
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| USG |
| U.S. Poles |
| VAW of America |
| Venture Lighting |
| Vista Lighting |
| Ward Leonard |
| WattStopper |
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| Westinghouse (Philips) |
| Wheatland Tube |
| Whitney Blake (Koil Kords) |
| Wide-lite Lighting |
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| Wieland |
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| Woodhead |
| Zenith Time Controls |
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