Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340088 | Metallurgical vessel and method of making the refractory lining of such vessels | Gerhard Madritsch, Bruno Hirschberg, Heinz Maslo, Paul Weitzer | 1994-08-23 |
| 4647020 | Gas-permeable element of a refractory material | Jean Liesch, Rudolf Handler | 1987-03-03 |
| 4589474 | Checkerwork in horizontal chamber of a regeneratively fired furnace | Josef Horak | 1986-05-20 |
| 4395026 | Refractory gas-permeable structural unit | Fritz Hodl | 1983-07-26 |