Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5407873 | Zirconium silicate brick and method for its production | Edmund Goerenz, Reinhold Janssen | 1995-04-18 |
| 5306451 | Method for the production of refractory bricks | — | 1994-04-26 |