Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274039 | Cartridge filter with frame | Matthias Schuster, Hans-Joachim Lippold | 2001-08-14 |
| 6059966 | Cartridge filter with frame | Matthias Schuster, Hans-Joachim Lippold, Jorgen Knudsen, Margit Hofmann | 2000-05-09 |
| 6027542 | Filter cartridge | Thomas Schroth, Jorgen Knudsen, Wolfgang Schmidt | 2000-02-22 |