Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671947 | Convertible passenger car | — | 1997-09-30 |
| 5641193 | Convertible passenger car | Siegfried Zepnik, Matthias Aydt, Kurt Pfertner | 1997-06-24 |
| 5622382 | Rollover bar for a motor vehicle | Siegfried Zepnik, Bodo Homann | 1997-04-22 |