Issued Patents All Time
Showing 25 most recent of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12415153 | Filter element and filter system | Dennis Stark, Klaus-Dieter Ruhland | 2025-09-16 |
| 12416057 | Tube product, hollow carrier of perforating gun and method of manufacturing the tube product | Jozef Balun, Waldemar Engel, Niko Große-Heilmann, Nathalie Weiß-Borkowski | 2025-09-16 |
| 12345224 | Muffler and filter system | Dennis Stark, Klaus-Dieter Ruhland | 2025-07-01 |
| 12330103 | Filter element, element frame of a filter element, filter bellows of a filter element, filter housing, and filter | Klaus-Dieter Ruhland | 2025-06-17 |
| 12292021 | Filter element and air cleaner assembly | Klaus-Dieter Ruhland, Timothy S. Finn | 2025-05-06 |
| 12036503 | Filter element and filter system | Klaus-Dieter Ruhland, Markus Wagner, Philipp Hettkamp | 2024-07-16 |
| 11918944 | Particle discharge device, filter assembly, and method | Klaus-Dieter Ruhland | 2024-03-05 |
| 11725615 | Secondary filter element and filter arrangement | Dennis Stark, Klaus-Dieter Ruhland | 2023-08-15 |
| 11719202 | Filter and filter cartridge | Klaus-Dieter Ruhland | 2023-08-08 |
| 11697084 | Filter element, element frame of a filter element, filter bellows of a filter element, filter housing, and filter | Klaus-Dieter Ruhland | 2023-07-11 |
| 11591993 | Filter element and air cleaner assembly | Timothy S. Finn, Klaus-Dieter Ruhland | 2023-02-28 |
| 11384415 | Steel alloy with high energy absorption capacity and tubular steel product | Niko Grosse-Heilmann, Andreas Peters, Isabella-Maria Zylla, Ernst Kozeschnik, Jozef Balun | 2022-07-12 |
| 11311891 | Multi-cyclone separator of a multi-stage fluid filter for cleaning gaseous fluid and multi-stage fluid filter | Klaus-Dieter Ruhland, Juergen Schmitt | 2022-04-26 |
| 11311890 | Filter device | Juergen Schmitt, Klaus-Dieter Ruhland | 2022-04-26 |
| 11273402 | Filter element, element frame of a filter element, filter bellows of a filter element, filter housing, and filter | Klaus-Dieter Ruhland | 2022-03-15 |
| 11230743 | Method of manufacturing a tubular product and tubular product | Marco Walterfang, Ralf Köster | 2022-01-25 |
| 11092118 | Filter housing and filter | Klaus-Dieter Ruhland | 2021-08-17 |
| 10961957 | Filter and filter cartridge | Klaus-Dieter Ruhland | 2021-03-30 |
| 10954899 | Filter and filter cartridge | Klaus-Dieter Ruhland | 2021-03-23 |
| 10865749 | Filter and filter cartridge | Klaus-Dieter Ruhland | 2020-12-15 |
| 10799823 | Housing main part of a filter housing, filter system, and pre-separator module of a filter system | Klaus-Dieter Ruhland | 2020-10-13 |
| 10408173 | Filter element | Klaus-Dieter Ruhland | 2019-09-10 |
| 10337472 | Filter and filter cartridge | Klaus-Dieter Ruhland | 2019-07-02 |
| 10337471 | Filter and filter cartridge | Klaus-Dieter Ruhland | 2019-07-02 |
| 10293294 | Air filter system and air filter element for an air filter system | Klaus-Dieter Ruhland | 2019-05-21 |