| # | Name | Location | Applications |
|---|---|---|---|
| 1. | OK YEO CHONG | 🇰🇷 Seoul, South Korea | 1 |
| 2. | Ok Yeo Chong | 🇨🇳 Tianjin, China | 1 |
| 3. | Oky Electric Industry Co., Ltd. | 🇯🇵 Tokyo, Japan | 1 |
| 4. | OKYA Inc. | 🇯🇵 Naka-gun, Japan | 1 |
| 5. | OKYO Pharma Limited | St. Peter Port, Guernsey | 2 |
| 6. | OKYZ | 🇫🇷 Paris, France | 2 |