| # | Name | Location | Applications |
|---|---|---|---|
| 1. | F. E. Frank Mayer | 🇩🇪 Bad Duerkheim, Germany | 1 |
| 2. | FEF Chemicals A/S | 🇩🇰 Koege, Denmark | 1 |
| 3. | FEF Chemicals A/S | 🇩🇰 Koge, Denmark | 1 |
| 4. | FEF GROUP PTY LTD | 🇦🇺 Glenwood, Australia | 2 |
| 5. | FEF GROUP PTY LTD | 🇦🇺 Glenwood, NSW, Australia | 1 |
| 6. | FEF3 Systems LLC | 🇺🇸 Seattle, WA, United States | 1 |