Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6918939 | Filter device | Karlheinz Muenkel, Marion Hartmann | 2005-07-19 |
| 6884273 | Multicell cyclone and method for producing it | Edvard Kopec, Volker Greif, Jens Haehn, Marion Hartmann | 2005-04-26 |