| # | Name | Location | Applications |
|---|---|---|---|
| 1. | BK ENERGY CO., LTD. | 🇰🇷 Yeosu-si, Jeollanam-do, South Korea | 1 |
| 2. | BK ENERGY CO., LTD. | 🇰🇷 Yeosu-si, South Korea | 2 |
| 3. | BKE-MACHINES INTERNATIONAL SA | 🇧🇪 Falisolle, Belgium | 1 |
| 4. | Bker Hughes Incorporated | 🇺🇸 Houston, TX, United States | 1 |
| 5. | BKey, Inc. | 🇺🇸 Schaumburg, IL, United States | 4 |