Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4512959 | Method for the recovery of alumina | Arthur J. Tielens | 1985-04-23 |
| 4308088 | Macrocrystalline aluminum oxide and method for its manufacture | Egon Cherdron, Heinz Hellinghausen, Alois Kramer, Avraham Metzer | 1981-12-29 |