Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4898087 | Laminarizer | Klaus Fitzner, Walter Betz, Wolfgang Schmitt | 1990-02-06 |
| 4576088 | Pressure-wave protective flap (or damper) | Wolfgang Mathewes, Klaus Fitzner | 1986-03-18 |