Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6948779 | Cutting roller for a continuously operating surface miner | Alexander Ehler, Volkmar Schrader, Burkhard Petack, Klaus Potenberg | 2005-09-27 |
| 6935443 | Mini disk bit | Alexander Ehler, Volkmar Schrader | 2005-08-30 |