| # | Name | Location | Applications |
|---|---|---|---|
| 1. | T&K Toka Co., Ltd. | 🇯🇵 Saitama, Japan | 2 |
| 2. | T.K TECHNOLOGY CO., LTD | 🇹🇼 Pingtung County, Taiwan | 1 |
| 3. | T.K.T Technologies Ltd. | 🇮🇱 Maccabim-Reut, Israel | 1 |
| 4. | T.K.T. ENTERPRISES, INC. | 🇺🇸 Roselle, IL, United States | 1 |
| 5. | TKT BRAINPOWER ENGINEERING, S.L. | 🇪🇸 Barcelona, Spain | 1 |
| 6. | TKT Brainpower, S.L. | 🇪🇸 Barcelona, Spain | 4 |
| 7. | TKT CORPORATION | 🇹🇼 Keelung, Taiwan | 1 |