| # | Name | Location | Applications |
|---|---|---|---|
| 1. | HK Army, Inc. | 🇺🇸 Gardena, CA, United States | 6 |
| 2. | HK Army, Inc. | 🇺🇸 Signal Hill, CA, United States | 5 |
| 3. | HKA Hydrofuel, LLC | 🇺🇸 Lafayette, LA, United States | 1 |
| 4. | HKA INVESTMENTS, LLC | 🇺🇸 Newport Beach, CA, United States | 2 |