Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9555351 | Filter device | Uwe Grass, Andreas Widmaier | 2017-01-31 |
| 9498744 | Air filter element and air filter | Robert Hasenfratz, Mario Rieger, Joerg Menssen, Michael Harenbrock, Duc Cuong Nguyen +10 more | 2016-11-22 |
| 9415337 | Air filter element and air filter | Robert Hasenfratz, Mario Rieger, Joerg Menssen, Michael Harenbrock, Duc Cuong Nguyen +10 more | 2016-08-16 |
| 8821734 | Method for purifying oil and apparatus therefor | Uwe Grass, Andreas Widmaier | 2014-09-02 |
| 7887701 | Fluid filter | Daniel Siefert, Andreas Widmaier | 2011-02-15 |