Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618104 | Method for cooling white cement clinker | Egbert Steffen, Gerhard Bomba, Franz-Josef Grothaus, Gerhard Zakel | 1997-04-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618104 | Method for cooling white cement clinker | Egbert Steffen, Gerhard Bomba, Franz-Josef Grothaus, Gerhard Zakel | 1997-04-08 |