Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5591008 | Fan impellers | Gunter Wrobel, Wolfgang Engel | 1997-01-07 |
| 4886415 | Fan with an essentially square housing | Siegfried Harmsen, Hilmar Kirchgessner, Josef Schneider | 1989-12-12 |