Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4903278 | Electrode holding and positioning | Heinz Stark | 1990-02-20 |
| 4750188 | Electrode arrangement for electroarc or reducing furnaces | Heinz Stark | 1988-06-07 |
| 4653067 | Current feed for an electrode of an electric smelting furnace | Heinz Stark | 1987-03-24 |
| 4551172 | Process of producing liquid carbon-containing iron | Lothar Formanek, Martin Hirsch, Harry Serbent, Wolfram Schnabel, Klaus-Dietrich Fritzsche +1 more | 1985-11-05 |
| 4490168 | Process of making steel by melting sponge iron in an electric arc furnace | Lothar Formanek, Martin Hirsch, Wolfram Schnabel, Harry Serbent, Klaus-Dietrich Fritzsche +1 more | 1984-12-25 |