Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5060915 | Two-piece terminal brick | Sabine Altpeter, Helmut Vacek | 1991-10-29 |
| 4944497 | Flushing block | Lorenz Dotsch, Josef Knauder, Hans Hoffgen | 1990-07-31 |
| 4568066 | Apparatus for introducing gas to molten metal | Hans Hoffgen | 1986-02-04 |