| Business | Phone |
| Production Engineering Sales 1344 Woodman Dr, Dayton 45432 | (937) 253-3300 |
| Vismatic Systems 907 E Central Ave, Dayton 45449 | (937) 859-4480 |
| Dayton Scientific Inc 92 Westpark Rd, Dayton 45459 | (937) 433-9600 |
| Dempsco Inc 7015 Corporate Way # 1, Dayton 45459 | (937) 434-3146 |
| Dt Industries Inc 313 Mound St, Dayton 45402 | (937) 586-5600 |
| E & M Equipment Co Dayton 45402 | (937) 222-0888 |
| Ferguson-Camco Co 1950 Cortina Dr, Dayton 45459 | (937) 433-3971 |