Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876801 | Method and means for drying bulk goods | Siegfried Birkle | 1989-10-31 |
| 4803811 | Lapping device for surface enhancement of bulk material | Siegfried Birkle | 1989-02-14 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876801 | Method and means for drying bulk goods | Siegfried Birkle | 1989-10-31 |
| 4803811 | Lapping device for surface enhancement of bulk material | Siegfried Birkle | 1989-02-14 |