Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8888882 | Filter mechanism for internal combustion engines | Steffen Ackermann, Duc Cuong Nguyen | 2014-11-18 |
| D705412 | Air filter | Klemens Dworatzek, Steffen Ackermann | 2014-05-20 |
| 8444736 | Air filter unit having a radially divided housing | Klemens Dworatzek, Steffen Ackermann | 2013-05-21 |
| 8303679 | Filter closure system | Karlheinz Muenkel, Raphaelle Brast, Steffen Ritter, Michael Thienel, Carsten Schippers +1 more | 2012-11-06 |
| 8246702 | Filter mechanism for internal combustion engines | Steffen Ackermann, Duc Cuong Nguyen | 2012-08-21 |
| 8097154 | Filter unit having a conical thread | Klemens Dworatzek, Steffen Ackermann | 2012-01-17 |
| 7976603 | Filter housing | Klemens Dworatzek | 2011-07-12 |
| 7918997 | Filter system | Klemens Dworatzek, Karlheinz Muenkel, Duc Cuong Nguyen | 2011-04-05 |
| 7896166 | Compact filter element | Karlheinz Muenkel | 2011-03-01 |
| 7784836 | Air filter connecting unit | Klemens Dworatzek | 2010-08-31 |
| 7744758 | Liquid filter | Klemens Dworatzek, Karlheinz Muenkel, Duc Cuong Nguyen | 2010-06-29 |
| 7635429 | Fluid filter element | Michael Wolf, Karlheinz Muenkel, Joachim Stinzendoerfer, Duc Cuong Nguyen, Oliver Scherer +1 more | 2009-12-22 |
| 7604128 | Filter apparatus | Klemens Dworatzek | 2009-10-20 |
| 7527732 | Housing closure for a filter | — | 2009-05-05 |
| 7442222 | Filter housing composed of first and second releasably connected sections | Klemens Dworatzek | 2008-10-28 |
| 7387726 | Liquid filter system | Michael Wolf, Joachim Stinzendoerfer, Karlheinz Muenkel, Norbert Maurer | 2008-06-17 |