| # | Name | Location | Applications |
|---|---|---|---|
| 1. | H&H Heating Sources, LLC | 🇺🇸 Newburgh, IN, United States | 2 |
| 2. | H. H. HAWKINS LTD. | 🇨🇦 Surrey, Canada | 1 |
| 3. | HHH Enterprises LLC | 🇺🇸 Evanston, WY, United States | 1 |
| 4. | HHH Manufacturing Co. | 🇯🇵 , Japan | 2 |
| 5. | HHH Manufacturing Co. | 🇯🇵 Osaka-shi, Japan | 1 |
| 6. | HHH MANUFACTURING CO. | 🇯🇵 Osaka, Japan | 1 |
| 7. | HHH Tempering Systems, Inc. | 🇺🇸 Vancouver, WA, United States | 1 |