Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6773480 | Ring filter consisting of star-shaped folded filtering material | Wilhelm Köhler, Wilhelm Schönherr | 2004-08-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6773480 | Ring filter consisting of star-shaped folded filtering material | Wilhelm Köhler, Wilhelm Schönherr | 2004-08-10 |