Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D328304 | Rotary fluid flow machine | Dieter Frohn, Bernhard Hanitsch, Hans-Heinrich Henning, Michael Osenberg | 1992-07-28 |
| 5100308 | Vane pump with adjustable housing and method of assembly | Friedhelm Gevelhoff, Dieter Frohn, Hans-Heinrich Henning | 1992-03-31 |