Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4531219 | Electrode assembly for arc furnaces | Dieter Zollner, Inge Lauterbach-Dammler, Thomas Taube, Hans Lades, Siegfried Liebel | 1985-07-23 |
| 4468783 | Electrode for arc furnaces | Dieter Zollner, Josef Otto, Josef Muhlenbeck, Friedrich Rittmann, Claudio Conradty +2 more | 1984-08-28 |
| 4466105 | Electrode for arc furnaces | Dieter Zollner, Josef Otto, Josef Muhlenbeck, Friedrich Rittmann, Claudio Conradty +2 more | 1984-08-14 |
| 4441190 | Coupling device for arc furnace electrodes | Gunther Vielstich, Josef Muhlenbeck, Josef Otto, Horst Feldhoff, Dieter Zollner +1 more | 1984-04-03 |
| 4425657 | Electrode for arc furnaces | Dieter Zollner, Josef Otto, Josef Muhlenbeck, Friedrich Rittmann, Claudio Conradty +2 more | 1984-01-10 |