Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6682683 | Method for manufacturing an accordion filter insert | Udo Michaelis, Jorgen Knudsen | 2004-01-27 |
| 6162272 | Accordion filter insert having an elastic sealing lip unitary with a frame of a filter element | Udo Michaelis, Jorgen Knudsen | 2000-12-19 |