Issued Patents All Time
Showing 1–25 of 57 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12415153 | Filter element and filter system | Dennis Stark, Michael Kaufmann | 2025-09-16 |
| 12345224 | Muffler and filter system | Dennis Stark, Michael Kaufmann | 2025-07-01 |
| 12330103 | Filter element, element frame of a filter element, filter bellows of a filter element, filter housing, and filter | Michael Kaufmann | 2025-06-17 |
| 12292021 | Filter element and air cleaner assembly | Michael Kaufmann, Timothy S. Finn | 2025-05-06 |
| 12036503 | Filter element and filter system | Michael Kaufmann, Markus Wagner, Philipp Hettkamp | 2024-07-16 |
| 11918944 | Particle discharge device, filter assembly, and method | Michael Kaufmann | 2024-03-05 |
| 11725615 | Secondary filter element and filter arrangement | Dennis Stark, Michael Kaufmann | 2023-08-15 |
| 11719202 | Filter and filter cartridge | Michael Kaufmann | 2023-08-08 |
| 11697084 | Filter element, element frame of a filter element, filter bellows of a filter element, filter housing, and filter | Michael Kaufmann | 2023-07-11 |
| 11591993 | Filter element and air cleaner assembly | Timothy S. Finn, Michael Kaufmann | 2023-02-28 |
| 11311891 | Multi-cyclone separator of a multi-stage fluid filter for cleaning gaseous fluid and multi-stage fluid filter | Michael Kaufmann, Juergen Schmitt | 2022-04-26 |
| 11311890 | Filter device | Juergen Schmitt, Michael Kaufmann | 2022-04-26 |
| 11273402 | Filter element, element frame of a filter element, filter bellows of a filter element, filter housing, and filter | Michael Kaufmann | 2022-03-15 |
| 11092118 | Filter housing and filter | Michael Kaufmann | 2021-08-17 |
| 10961957 | Filter and filter cartridge | Michael Kaufmann | 2021-03-30 |
| 10954899 | Filter and filter cartridge | Michael Kaufmann | 2021-03-23 |
| 10865749 | Filter and filter cartridge | Michael Kaufmann | 2020-12-15 |
| 10799823 | Housing main part of a filter housing, filter system, and pre-separator module of a filter system | Michael Kaufmann | 2020-10-13 |
| 10408173 | Filter element | Michael Kaufmann | 2019-09-10 |
| 10337471 | Filter and filter cartridge | Michael Kaufmann | 2019-07-02 |
| 10337472 | Filter and filter cartridge | Michael Kaufmann | 2019-07-02 |
| 10293294 | Air filter system and air filter element for an air filter system | Michael Kaufmann | 2019-05-21 |
| 10245541 | Air filter system, air filter element and method for exchanging an air filter element | Michael Kaufmann | 2019-04-02 |
| 10159923 | Hollow filter element, grip device of a hollow filter element, and filter device with at least one hollow filter element | Michael Kaufmann | 2018-12-25 |
| 10138852 | Air filter element | Michael Kaufmann | 2018-11-27 |