| # | Name | Location | Applications |
|---|---|---|---|
| 1. | H. Koch & Sons Co., Inc. | 🇺🇸 Anaheim, CA, United States | 2 |
| 2. | H. Koch & Sons, Co., Inc. | 🇺🇸 St. Petersburg, FL, United States | 2 |
| 3. | H.K.O. ISOLIER—UND TEXTILTECHNIK GMBH | 🇩🇪 Oberhausen, Germany | 3 |
| 4. | HK Oceancomm Technology Co., Limited | ðŸ‡ðŸ‡° Wan Chai, Hong Kong | 1 |