| Ralston Metal Products Limited |
| Advance Controls, Inc. (ACI) |
| Electromate Corporation |
| Unity Manufacturing |
| Federal Pacific Electric Company |
| Eurobec Metal |
| Synchron |
| Monitor Manufacturing |
| Wacline |
| ATC-Marsh |
| MCC Electronics |
| Ranco |
| Zeks Air Drier Corporation |
| Furnas |
| AIC Equipment & Controls |
| Crydom |
| Ciessi Ventilatori |
| Yokogawa |
| Cooper Bussman |
| Copper Bussmann |
| Hawker |
| Veralogic |
| White-Westinghouse |
| Mercier Corporation |
| Echelon |
| Mean Well |
| Well-Guard Control |
| Plastics Extrusion Machinery |
| Dimco-Gray |
| Crown Controls Corporation |
| Valco Cincinnati |
| Mettler Toledo |
| Sarel |
| Aerovox |
| NTE Electronics Inc. |
| IMCS |
| Bindicator |
| Macromantic |
| Syrelec-Crouzet |
| Timeco |
