| # | Name | Location | Applications |
|---|---|---|---|
| 1. | W.L. French Hydropower Holdings LLC | 🇺🇸 Chelmsford, MA, United States | 5 |
| 2. | WLF INNOVATIONS LTD. | 🇬🇧 , United Kingdom | 1 |
| 3. | WLF, L.L.C. | 🇺🇸 Kansas City, MO, United States | 1 |
| 4. | WÖLFEL ENGINEERING GMBH + CO. KG | 🇩🇪 Höchberg, Germany | 2 |