Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829538 | Furnace hearth | Gunter Gelsdorf, Kurt Bohm, Manfred Schubert | 1989-05-09 |
| 4760039 | Refractory composition and refractory unfired shapes produced therefrom | — | 1988-07-26 |
| 4648097 | Electrode for an electric arc furnace | Hans Leistner, Gunter Gelsdorf | 1987-03-03 |