Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340088 | Metallurgical vessel and method of making the refractory lining of such vessels | Gerhard Madritsch, Bruno Hirschberg, Friedrich Kassegger, Heinz Maslo | 1994-08-23 |
| 5067693 | Electric arc oven for treating molten metals with a gas and a process therefor | Etienne Lepoutre, Michel Devaux, Bruno Hirschberg, Franz-Adolf Petio | 1991-11-26 |
| 4427184 | Taphole apparatus | Rupert Steinwider | 1984-01-24 |