Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850814 | Hydraulic gear pump | Siegfried Hertell | 1989-07-25 |
| 4813853 | Internal gear pump | Siegfried Hertell | 1989-03-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850814 | Hydraulic gear pump | Siegfried Hertell | 1989-07-25 |
| 4813853 | Internal gear pump | Siegfried Hertell | 1989-03-21 |