| # | Name | Location | Applications |
|---|---|---|---|
| 1. | Y TECH CO., LTD. | 🇰🇷 Gyeonggi-do, South Korea | 1 |
| 2. | Y-Tec Corporation | 🇯🇵 , Japan | 1 |
| 3. | Y-TEC CORPORATION | 🇯🇵 Hiroshima, Japan | 7 |
| 4. | Y-TEC CORPORATION | 🇯🇵 Aki-Gun, Hiroshima, Japan | 1 |
| 5. | Y-TEX CORPORATION | 🇺🇸 Cody, WY, United States | 8 |
| 6. | Y.T. ENTERPRISES LTD. | 🇬🇧 London, United Kingdom | 1 |
| 7. | Ytel Photonics Inc. | North Korea | 1 |
| 8. | YTEL PHOTONICS INC. | 🇰🇷 Gwangju-Si, South Korea | 2 |
| 9. | Ytel Photonics Inc. | 🇰🇷 Gwangiu-Si, South Korea | 1 |
| 10. | Ytel Photonics Inc. | 🇰🇷 Gwangju, South Korea | 3 |