Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874037 | Apparatus for cooling a hot product gas | Gero Papst | 1989-10-17 |
| 4805880 | Fluidized bed arrangement for the production of molten pig iron and steel pre-products | Rolf Hauk, Gero Papst, Klaus Langner, Werner Kepplinger, Leopold Seirlehner | 1989-02-21 |