Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6299660 | Accordion filter with a protective mask | Peter Pfeuffer, Hans-Joachim Lippold, Hans Leibold | 2001-10-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6299660 | Accordion filter with a protective mask | Peter Pfeuffer, Hans-Joachim Lippold, Hans Leibold | 2001-10-09 |