Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675878 | Method and device for the melting and heating of materials | Herbert Wilhelmi, Kurt Kegel, Dieter Zollner, Inge Lauterbach-Dammler, Friedrich Rittmann | 1987-06-23 |
| 4639928 | Disc means for an electrode for use in electric arc furnaces | Dieter Zollner, Inge Lauterbach-Dammler, Thomas Taube | 1987-01-27 |
| 4481500 | Electrode for electric arc furnaces | Dieter Zollner, Friedrich Rittmann | 1984-11-06 |
| 4468783 | Electrode for arc furnaces | Hanns-Georg Bauer, Dieter Zollner, Josef Otto, Josef Muhlenbeck, Friedrich Rittmann +2 more | 1984-08-28 |
| 4466105 | Electrode for arc furnaces | Hanns-Georg Bauer, Dieter Zollner, Josef Otto, Josef Muhlenbeck, Friedrich Rittmann +2 more | 1984-08-14 |
| 4425657 | Electrode for arc furnaces | Hanns-Georg Bauer, Dieter Zollner, Josef Otto, Josef Muhlenbeck, Friedrich Rittmann +2 more | 1984-01-10 |