Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805880 | Fluidized bed arrangement for the production of molten pig iron and steel pre-products | Rolf Hauk, Gero Papst, Klaus Langner, Michael Nagl, Werner Kepplinger | 1989-02-21 |