Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767067 | Method of and agricultural machine for producing power fodder | Dirk Bruer, Franz Heidjann | 1988-08-30 |
| 4728046 | Method of and agricultural machine for producing power fodder | Dirk Bruer, Franz Heidjann | 1988-03-01 |