Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6698456 | Protective corrugated plastic pipe | Sören Schröter, Peter Winkler | 2004-03-02 |
| 6164338 | Corrugated pipe with foot | Willi Holzer, Manfred Krauss, Carsten Pfister | 2000-12-26 |