Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5620505 | Filter | Volker Koch, Helmut Luka, Bruno M. Sommer, Manfred Wagner | 1997-04-15 |
| 5618324 | Filter insert | Bruno M. Sommer, Helmut Luka, Thomas Sch urg, Siegfried Rapp | 1997-04-08 |