| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Ross Engineering Corp. | USA | |
| 2 | Struthers-Dunn Inc. | USA | |
| 3 | SE Relays | USA | |
| 4 | RelComm Technologies Inc. | USA | |
| 5 | Hubbell Lighting | USA | |
| 6 | Macromatic Industrial Controls Inc. | USA | |
| 7 | Unimar Inc. | USA | |
| 8 | PICS INC | USA | |
| 9 | Hubbell Automation | USA | |
| 10 | STK Electronics Inc. | USA | |
| 11 | Accurate Electronics Inc. | USA |
