Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5637158 | Method for the manufacture of an expansible anchor consisting of corrosion-resistant steel | Norbert Arnold, Bernd Hein | 1997-06-10 |
| 5393109 | Pipe connection having a cutting ring | — | 1995-02-28 |
| 4788034 | Age hardenable maetensitic steel | Helmut Brandis | 1988-11-29 |