Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6648253 | Method for operating the air circuit and conveying stock flow in the casing of a hammer mill | Erich Köhl, Heike Sommerfeld | 2003-11-18 |
| 6371393 | Housing for a comminution machine | Erich Köhl, August Van Der Beek | 2002-04-16 |
| 4798345 | Hammer breaker | — | 1989-01-17 |
| 4542856 | Hammer breaker | — | 1985-09-24 |