| # | Name | Location | Applications |
|---|---|---|---|
| 1. | E. I. Engineering Co., Ltd. | 🇯🇵 Hyogo, Japan | 1 |
| 2. | EI ELECTRONICS LLC | 🇺🇸 Westbury, NY, United States | 28 |
| 3. | EI ELECTRONICS LLC, D/B/A ELECTRO INDUSTRIES/GAUGE TECH | 🇺🇸 Westbury, NY, United States | 3 |
| 4. | EI-ELECTRONIC IDEAS LIMITED | 🇬🇧 Glasgow, Strathclyde, United Kingdom | 1 |
| 5. | Eie Maskin AB | 🇸🇪 Bandhagen, Sweden | 2 |
| 6. | EIE MATERIALS, INC. | 🇺🇸 Lexington, KY, United States | 5 |
| 7. | EIEIO, INC. | 🇺🇸 Austin, TX, United States | 1 |
| 8. | EIé Corporation | 🇺🇸 McCook, IL, United States | 1 |