Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8216332 | Filter with a filter housing | Klaus-Dieter Ruhland | 2012-07-10 |
| 7658777 | Filter element and filter system for the intake air of an internal combustion engine | Klaus-Dieter Ruhland, Oliver Steins, Ralf Poh | 2010-02-09 |
| 7442221 | Filter element | Klaus-Dieter Ruhland | 2008-10-28 |
| 7004986 | Filter in a filter housing | Manfred Winter, Volker Greif, Klemens Dworatzek, Marion Hartmann, Karlheinz Muenkel +2 more | 2006-02-28 |
| 6884273 | Multicell cyclone and method for producing it | Volker Greif, Klemens Dworatzek, Jens Haehn, Marion Hartmann | 2005-04-26 |
| 6572667 | Filter system | Volker Greif, Manfred Winter | 2003-06-03 |
| 6234132 | Intake system of thermoplastic plastics | Klaus-Peter Alfred Wachsmann, Volker Ernst, Rudolf Leipelt | 2001-05-22 |