| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Littelfuse Inc. | USA | |
| 2 | Athens Technical Specialists Inc. | USA | |
| 3 | ETI Precision – Electrical Test Instruments | USA | |
| 4 | Megatester | USA | |
| 5 | Laboratorio Elettrofisico USA | USA | |
| 6 | Digalog Systems Inc. | USA | |
| 7 | Lookingforsolutions.com LLC | USA | |
| 8 | CAMI Research Inc. | USA | |
| 9 | Circuit Equipment Corp. | USA | |
| 10 | Associated Research | USA | |
| 11 | Vanguard Instruments | USA | |
| 12 | NF Corporation | USA | |
| 13 | Jonard Industries Corp. | USA | |
| 14 | HV Diagnostics Inc. | USA | |
| 15 | Manta Test Systems | USA | |
| 16 | Semitek International | USA | |
| 17 | Hipotronics Inc. | USA | |
| 18 | Valhalla Scientific | USA |
