| # | Name | Location | Applications |
|---|---|---|---|
| 1. | GBF CORP. | 🇺🇸 Elk Grove Village, IL, United States | 1 |
| 2. | GBF CORPORATION | 🇺🇸 Elk Grove Village, IL, United States | 1 |
| 3. | GBF Gesellschaft Fuer Bemessungfsforschung MBH | 🇩🇪 Aachen, Germany | 1 |
| 4. | GBF Gesellschaft Fuer Bemessungsforschung MBH | 🇩🇪 Aachen, Germany | 2 |
| 5. | GBF Gesellschaft fur Biotechnologische Forschung mbH | 🇩🇪 Braunschweig, Germany | 1 |
| 6. | GBF mbH | 🇩🇪 Braunschweig, Germany | 1 |
| 7. | GBF-GESELLSCHAFT FUR BIOTECHNOLOGISCHE FORSCHUNG | 🇩🇪 Braunschweig, Germany | 1 |