Issued Patents 2016
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9511317 | Air filter system and air filter element for an air filter system | Klaus-Dieter Ruhland | 2016-12-06 |
| 9486729 | Air filter element, filter housing and filter arrangement | Klaus-Dieter Ruhland | 2016-11-08 |
| 9457307 | Filter system with filter element | Klaus-Dieter Ruhland, Imre Marton | 2016-10-04 |
| 9457308 | Filter element and filter system with a filter element | Klaus-Dieter Ruhland | 2016-10-04 |
| D762834 | Air filter | Peter Theiss | 2016-08-02 |
| 9358489 | Air filter system, air filter element and method for exchanging an air filter element | Klaus-Dieter Ruhland | 2016-06-07 |
| 9314721 | Filter system with seal | Klaus-Dieter Ruhland | 2016-04-19 |
| 9254457 | Air filter system, air filter element and method for exchanging an air filter element | Klaus-Dieter Ruhland | 2016-02-09 |
| 9233331 | Air filter element | Klaus-Dieter Ruhland | 2016-01-12 |
| 9233333 | Filter element | Klaus-Dieter Ruhland | 2016-01-12 |