Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5058659 | Process for the production of steel having a varying chemical composition in the cross-section | Hans-Joachim Selenz, Friedrich Hofer | 1991-10-22 |
| 4647306 | Process for the treatment of metal melts with scavenging gas | Roman Obenaus, Klaus Schafer | 1987-03-03 |