Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7250109 | Back-wash filter | Rudiger Lennartz, Willi Rott | 2007-07-31 |
| 6890434 | Backflush filter, in particular for filtering lubricant oil | Willi Rott, Wilhelm Vieten, Rudiger Lennartz, Sivagnanam Kandiah | 2005-05-10 |
| 4518501 | Flush-back filter | Rudiger Lennartz, Willi Rott | 1985-05-21 |