Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6497562 | Piston pump | Albrecht Otto, Helmut Steffes | 2002-12-24 |
| 6450787 | Piston pump | Stephan Risch, Axel Hinz, Hans-Dieter Reinartz, Helmut Steffes, Georg Sonnenschein +4 more | 2002-09-17 |