Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4773476 | Heat pipe of aluminum, steel or gray cast iron | Helmut Wulf, Helmut Kreeb | 1988-09-27 |
| 4693301 | Method for heating a road by means of geothermally fed heating installation as well as a road-heating installation for carrying out the method | Helmut Wulf, Helmut Kreeb | 1987-09-15 |
| 4532894 | Heating arrangement for electrically driven vehicles | Helmut Wulf | 1985-08-06 |