Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4438515 | Protection of graphite electrodes | Helmut Jaunich, Josef Schiffarth | 1984-03-20 |
| 4435510 | Protection of graphite electrodes | Dennis Greensmith, Roderic H. Hammerton, Colin J. Wall, Helmut Jaunich, Josef Schiffarth | 1984-03-06 |