Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4224287 | Process for the preparation of pure aluminum oxide | Siegfried Ziegenbalg, Gerhard Fischer, Gerhard Haake | 1980-09-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4224287 | Process for the preparation of pure aluminum oxide | Siegfried Ziegenbalg, Gerhard Fischer, Gerhard Haake | 1980-09-23 |