| Business | Phone |
| Inotek Corp 11212 Indian Trl, Dallas 75229 | (817) 877-5100 |
| Dallas Valve & Instrument Co 3365 Garden Brook Dr, Dallas 75234 | (972) 241-6814 |
| Southwestern Gage Inc 3151 Commonwealth Dr, Dallas 75247 | (214) 358-5151 |
| Silvers Machinery Co 8434 Endicott Ln, Dallas 75227 | (972) 484-6803 |