Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4290801 | Method and installation for the cooling of reduced material such as fine grained ore | Alfred Kryczun | 1981-09-22 |
| 4227873 | Kiln with overlying beds | Walter Fritsch | 1980-10-14 |