Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7056271 | Folded-three-dimensional object, particularly a filter element | Werner Kadel | 2006-06-06 |
| 6193773 | Dust filter bag | Klaus Veeser | 2001-02-27 |
| 6164457 | Filter cartridge having a filter element inserted in a flexurally rigid frame | — | 2000-12-26 |
| 5958097 | Filter insert | Udo Michaelis, Jorgen Knudsen | 1999-09-28 |
| 5863482 | Method for manufacturing a filter insert | Udo Michaelis, Jorgen Knudsen | 1999-01-26 |
| 5779747 | Flexible folded filter insert | Dieter Hintenlang | 1998-07-14 |
| 5167740 | Method of making a filter insert of nonwoven material in the form of a pleated pack | Udo Michaelis | 1992-12-01 |
| 4728426 | Filter pack | Volker Rudinger, Hans Leibold, Werner Alken | 1988-03-01 |