Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4626654 | Metallurgical plasma melting process | Fred Esser, Detlev Klopper, Walter Lachner | 1986-12-02 |
| 4467085 | Chemical compounds, process for their preparation, agents containing these compounds, and their use | — | 1984-08-21 |
| 4390773 | Contact electrode for melting and heating furnaces with DC plasma heating | Fred Esser, Detlev Klopper, Walter Lachner | 1983-06-28 |