Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6266883 | Method of making a grate plate | Otto Heinemann, Hermann Niemerg, Ludger Brentrup | 2001-07-31 |
| 5947719 | Grate plate construction | Otto Heinemann, Hermann Niemerg, Ludger Brentrup | 1999-09-07 |
| 4896837 | Roller mill | Otto Heinemann | 1990-01-30 |
| 4792393 | Spiral air sifter having air regulation | Gotthardt Blasczyk, Hubert Eickholt, Otto Heinemann, Ludger Kimmeyer, Peter Tiggesbaumker +2 more | 1988-12-20 |
| 4236997 | Air separator apparatus | Josef A Wessel, Manfred Muller, Otto Heinemann | 1980-12-02 |