Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4407864 | Process for treating iron sponge | Kurt Stift, Horst Sulzbacher | 1983-10-04 |
| 4376139 | Process for treating metallic starting materials for smelting plants, particularly iron sponge particles | Horst Sulzbacher, Kurt Stift | 1983-03-08 |
| 4254167 | Process of treating sponge iron for protection against reoxidation and apparatus for carrying out the process | Horst Sulzbacher, Kurt Stift | 1981-03-03 |