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| Hubbell / Unenco | |
| ProAtion Systems | ||
| Hubbell Wiegmann | ||
| Solid State Advanced Controls Inc. | ||
| Hubbell Incorporated | ||
| HomAtion Systems | ||
| Fisher Pierce | ||
| GE General Electric Industrial Systems Division - - - | ||
| State Tool and Manufacturing | ||
| Hubbell / Killark / Stahl | ||
| Aromat Automation Controls Division | ||
| Hubbell Wiring Device Kellems | ||
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