Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644619 | Valve housing with embedded electrical leads | Waldemar Friesenhahn, Wolfgang Richter | 2003-11-11 |
| 6601544 | Thermostat valve with electrically heatable operating element | Waldemar Friesenhahn, Ulrich Dehnen | 2003-08-05 |