Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |