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| RIOTronics Corp | |
| Ektaco AS | ||
| Cutler Hammer | ||
| Design Concepts International | ||
| Enetics, Incorporated | ||
| Bitronics, Inc. | ||
| Continental Control Systems, LLC | ||
| HOBUT Howard Butler Ltd. | ||
| Active Control Instrumentation | ||
| Brultech Research Inc. | ||
| Ohio Semitronics, Inc | ||
| NWX Northwest Extension, Inc. | ||
| Pacific Control Systems, Inc. | ||
| Square D - North American Division of Schneider Electric 1415 South Roselle Road - Palatine, IL 60067 USA - - | ||
| Parasense Inc. | ||
| Weschler Instruments | ||
| Osaki Meter Sales, Inc. | ||
| Itron, Inc. 2818 N. Sullivan Road - Spokane, WA 99216 USA - - | ||
| Electro Industries | ||
| Inductoheat, Inc. | ||
| OmniComp / Enron | ||
| ELK Products, Inc. | ||
| Innovatec Corporation | ||
| AMI - Analog Modules, Inc. 126 Baywood Avenue - Longwood, FL 32750-3426 USA - - | ||
| Wattmeters, Inc. | ||
| Elcomponent Ltd. | ||
| Solcon Industries Ltd. | ||
| Scientech Inc. | ||
| Seltek Instruments Ltd. | ||
| microMETER | ||
| E MON Corporation | ||
| Badger Meter, Inc. | ||
| Data Industrial | ||
| Electro Industries/GaugeTech | ||
| Itronix | ||
| Crompton Instruments | ||
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