| Rama Corporation |
| Baumer |
| Balluff |
| Bernhard Inc |
| Longfellow |
| Temposonics |
| MTS Sensors |
| Watlow Controls |
| O.A. Schott Co. |
| Dongan Electric Manufacturing Company |
| Hevi-Duty Electric Co |
| Dynamic Conveyor Corporation |
| Short Longfellow |
| Gould |
| Rathgeber & Co. |
| Parker Schrader Bellows |
| Parker-Skinner |
| Truheat |
| Wiegand |
| Omega Heater Company |
| Watlow-Toshiba |
| Chromalox |
| O.T.E. |
| Hanna Corporation |
| AIS |
| Wellman |
| Industrial Heater Corporation (I. H. Co) |
| IMS Company |
| PMI |
| Ogden Manufacturing |
| P.M.I. |
| Johann Fischer |
| C.A. Norgren |
| KDK |
| Incoe |
| TAB |
| Heatcon |
| Rite-Tek |
| EMI Plastics Equipment |
| RVP |
