| # | Name | Location | Applications |
|---|---|---|---|
| 1. | DS FILTER CO., LTD. | 🇰🇷 Gongju-si, South Korea | 1 |
| 2. | DSF BV | 🇳🇱 Dwingeloo, Netherlands | 1 |
| 3. | DSF REFRACTORIES AND MINERALS LIMITED | 🇬🇧 Derbyshire, United Kingdom | 1 |
| 4. | DSFE Security Systems International, Inc | 🇺🇸 Boynton Beach, FL, United States | 1 |