Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7604694 | Marking liquid | Hanns Dieter Denninger, Thomas Spengler, Klaus Schroder | 2009-10-20 |
| 7365107 | Marking liquid | Hans-Dieter Denninger, Thomas Spengler, Klaus Schroder | 2008-04-29 |
| 5980598 | Filter cleaning system including individually driven belt mounted extending nozzles | — | 1999-11-09 |
| 5827338 | Filter cleaning system including belt mounted extending nozzle | — | 1998-10-27 |
| 5466271 | Pre-filter with rotating nozzle | — | 1995-11-14 |
| 5336307 | Marker pencil | Manfred Schweizer, Thomas Stoecklein | 1994-08-09 |
| 5169439 | Marking fluid | Peter Kramp, Erhard Onczul | 1992-12-08 |
| 4222754 | High efficiency filter for textile waste | — | 1980-09-16 |