Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5554287 | Cellulose matrix filter material | Dieter Beck, Thomas Breitbach, Rudiger Leibnitz, Gerd Ritter | 1996-09-10 |
| 5290457 | Filter element with regenerable bulk material filling and method for making same | Massoud Karbachsch, Helmut Ruger | 1994-03-01 |
| 5223139 | Filter material in the form of flexible leaves or sheets and a method of producing such material | Helmut Ruger, Gerd Ritter, Hans-Jürgen Hofmann | 1993-06-29 |
| 5169528 | Filter element | Massoud Karbachsch, Helmut Ruger | 1992-12-08 |
| 5141643 | Filter material formed by fibride particles | Gerd Ritter | 1992-08-25 |
| 5102541 | Supporting tube construction for filter modules | — | 1992-04-07 |