| # | Name | Location | Applications |
|---|---|---|---|
| 1. | Fr. Sobbe GmbH | 🇩🇪 Dortmund, Germany | 2 |
| 2. | FRS Group, LLC | 🇺🇸 Rocklin, CA, United States | 22 |
| 3. | FRS Group, LLC | 🇺🇸 Carnelian Bay, CA, United States | 7 |
| 4. | FRS Waterware, Inc. | 🇯🇵 Tokyo, Japan | 1 |
| 5. | FRSKY ELECTRONIC CO., LTD. | 🇨🇳 Jiangsu, China | 1 |