Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5234051 | Compact heat exchanger-ventilation unit for a vehicle | Hans Weizenburger, Dieter Roschinski | 1993-08-10 |
| 5209189 | Internal-combustion engine | Hans Weitzenbuerger, Dieter Esche, Albert Nolte | 1993-05-11 |