| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | PSI Automation | USA | |
| 2 | United States Energy Corp. | USA | |
| 3 | The Hilliard Corporation | USA | |
| 4 | Sprecher + Schuh | USA | |
| 5 | Kocsis Technologies Incorporated | USA | |
| 6 | POW-R-Quik | USA | |
| 7 | Mitten Manufacturing Incorporated | USA | |
| 8 | PowerTrain Technology Inc. | USA | |
| 9 | Austart | USA | |
| 10 | DRS Consolidated Controls | USA | |
| 11 | Hydraulic Specialty Inc. | USA | |
| 12 | Maradyne Corp. | USA | |
| 13 | Tech Development Inc. | USA |
