| # | Name | Location | Applications |
|---|---|---|---|
| 1. | WT Technologies, LLC | 🇺🇸 New York, NY, United States | 2 |
| 2. | WTT Holding ApS | 🇩🇰 Brande, Denmark | 1 |
| 3. | WTT Systems, LLC | 🇺🇸 Chagrin Falls, OH, United States | 1 |
| 4. | WTT-Wilchwitzer Thermo-Technik GmbH | 🇩🇪 Nobitz-Wilchwitz, Germany | 1 |