Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4963716 | Vehicular air heater using PTC heater tablets associated with funnel heat exchanges | Hendrikus Velten | 1990-10-16 |
| 4881508 | Heating device for fluid, particularly fuel | Jan Bakker | 1989-11-21 |