Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4749386 | Safety filter for a vacuum cleaner | Rolf Strohmeyer | 1988-06-07 |
| 4406678 | Dust collector for vacuum cleaner | — | 1983-09-27 |
| 4399378 | Filter for cooling air stream of electric commutator motor for household device | Heinz-Gerhard Krumm | 1983-08-16 |