| Spence-Advance Valve |
| Chicago Blower Corporation |
| Long Tang |
| Continental Hydraulics |
| Abex Denison |
| Federal Products |
| Bellofram |
| Festo |
| Daman |
| HyVair |
| Nass Magnet |
| Piller |
| Bayside |
| Numatics/Decco |
| BBC |
| Decco |
| Automatic Switch Company |
| Bellows-Valvair |
| Schrader-Bellows-Valvair |
| Eaton-Vickers |
| Fafnir |
| Miller Fluid Power |
| Telemecanique-Square D |
| Eaton/Cutler-Hammer |
| Gems Sensors Inc. |
| Clippard |
| Mead Fluid Dynamics |
| Pneu-trol |
| Hydaira Coreal |
| Copeland |
| Rapid |
| Hoffman |
| Martin Sprocket & Gear |
| Worcester |
| Deltrol |
| Thermal Corporation |
| Watlow |
| Gebhard Balluff |
| Dynalco |
| Barksdale |
