Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618104 | Method for cooling white cement clinker | Gunther Koeberer, Egbert Steffen, Gerhard Bomba, Gerhard Zakel | 1997-04-08 |
| 5264654 | Method and apparatus for processing contaminated soils | Wilfried Kreft | 1993-11-23 |