| Business | Phone |
| E & M Engineering Inc 2381 Philmont Ave # 219, Huntingdon Valley 19006 | (215) 947-4562 |
| G & T Assoc Inc 345 Emerson Rd, Huntingdon Valley 19006 | (215) 947-8237 |
| Vektron Corp 1390 Industrial Hwy, Huntingdon Valley 19006 | (215) 354-0300 |
| Cet Engineering Svc 321 Washington St, Huntingdon Valley 16652 | (814) 643-8260 |
| Ecm Inc 808 Mifflin St, Huntingdon Valley 16652 | (814) 643-5100 |