| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Amperite Co. | USA | |
| 2 | Olympic Controls Corp. | USA | |
| 3 | Relay Service Co. | USA | |
| 4 | RelComm Technologies Inc. | USA | |
| 5 | Hartland Controls | USA | |
| 6 | Celduc Inc. | USA | |
| 7 | Finder Worldwide | USA | |
| 8 | Eaton Crouse-Hinds Division | USA | |
| 9 | Jameco Electronic Components & Computer Products | USA | |
| 10 | Stetron International Inc. | USA | |
| 11 | Coto Corporation | USA |
