- Aardco
- Amer Foundry & Furnace Co
- APCOM Inc
- Astro-Pak
- Automated Logic Corp
- Automation Components Inc
- Butler's Secret
- Butler's Specialty Cleaning
- Butlers Septic Svc
- Butlers Septic Svc Garage
- Cadet Manufacturing Co
- Cadet Manufacturing Co
- Carr Co
- Chardonnay Corp
- Citel America Inc
- Con-Syst-Int Group Inc
- Control One Inc
- Control Systems
- Controls Corp Of America
- Cooper-Atkins Corp
- Custom Home Control
- Environmental Technology Inc
- Eurotherm Controls Inc
- Fluid Kinetics Inc
- Foxboro Co
- Gammaflux Inc
- GE Control Products
- General Energy Corp
- Genesis Electronics Mfg
- H I Solutions Inc
- Hamilton Test Systs Inc
- Heater Designs Inc
- Honeywell International
- Independent Energy Inc
- ISS
- ISS
- Jayco Inc
- Johnson Controls Inc
- Johnson Controls Inc
- Johnson Controls Inc
- Kidde-Fenwal Inc
- KMC Controls
- Mac Nabb Engineering Co Inc
- Mclean West
- Midwest Timer Svc
- Modine Southeast Inc
- Naugatuck Manufacturing Co
- Phytotronics Inc
- Portage Electric Products
- Pres-Air-Trol Corp
- Procontrol Midwest
- R & J Mfg Co
- Repcoreplacement
- Rotronic Instrument Corp Inc
- Teletrol Systems Inc
- Thermal Products Corp
- Thermal Products Corp
- Thermo Systems Technology Inc
- Tri-Mer Corp
- Uni-Line North America
- Vacuum Products Inc
- Viron International
- Vulcan Electric Co
- Watlow Controls
- Wedco Sales & Svc Inc
- Whitaker Electronics
- White-Rodgers
- White-Rodgers
