| # | Name | Location | Applications |
|---|---|---|---|
| 1. | 21 (TWO-ONE) CO., LTD. | 🇯🇵 Hiroshima-shi, Japan | 1 |
| 2. | 21 (Two-One) Co., Ltd. | 🇯🇵 Hiroshima, Japan | 1 |
| 3. | 21 TH CENTURY CO., LTD | 🇰🇷 Hwaseong-si, South Korea | 1 |
| 4. | 21TDMC Group Oy | 🇫🇮 Berlin-Wilmersdorf, Finland | 1 |
| 5. | 21TH CENTURY CO., LTD | 🇰🇷 Hwaseong-si, South Korea | 1 |
| 6. | 21TH CENTURY CO., LTD | 🇰🇷 Hwanseong-si, South Korea | 1 |