| # | Name | Location | Applications |
|---|---|---|---|
| 1. | GT Technologies | 🇺🇸 Westland, MI, United States | 17 |
| 2. | GT TECHNOLOGIES, INC. | 🇺🇸 Westland, MI, United States | 1 |
| 3. | GT Telecom Co., Ltd | 🇰🇷 Gumi-shi, South Korea | 3 |
| 4. | GT Telecom Co., Ltd. | 🇰🇷 Gumi-shi, Kyungsangbuk-do, South Korea | 1 |
| 5. | GTT CO., LTD. | 🇰🇷 Gyeonggi-Do, South Korea | 1 |