| # | Name | Location | Applications |
|---|---|---|---|
| 1. | C & K Safety, LLC | 🇺🇸 Midland, MI, United States | 1 |
| 2. | CK SMART, LLC | 🇺🇸 Cranberry Township, PA, United States | 1 |
| 3. | CK Solution Co., Ltd. | 🇰🇷 Suwon-si, Gyeonggi-do, South Korea | 1 |
| 4. | CK Solution Co., Ltd. | 🇰🇷 Suwon-si, South Korea | 1 |
| 5. | CK Solution Co., Ltd. | 🇰🇷 Yongin-si, South Korea | 2 |
| 6. | CKS Group, LLC | 🇺🇸 Gainesville, VA, United States | 2 |