Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8167603 | Device for the production of corrugated pipes | Claus Hetzner | 2012-05-01 |
| 7118369 | Corrugated pipe plant | Karl Werner Dietrich | 2006-10-10 |
| 5773044 | Apparatus for the manufacture of corrugated tubing from thermoplastic synthetic resin | Karl Werner Dietrich, Hubert M. Drossbach | 1998-06-30 |