Issued Patents 2018
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10130223 | Vacuum cleaning device with a tank-type vacuum cleaner | Ralf Sauer | 2018-11-20 |
| 10080474 | Vacuum cleaner filter bag | Ralf Sauer | 2018-09-25 |
| 10052003 | Method for optimizing a device for vacuum cleaning with a hand-held, compact, or upright vacuum cleaner and bag filter | Ralf Sauer | 2018-08-21 |
| 10045674 | Method for optimizing a vacuum cleaning apparatus having a cylinder vacuum cleaner or upright vacuum cleaner and a filter bag | Ralf Sauer | 2018-08-14 |
| 9913563 | Retaining plate | Ralf Sauer | 2018-03-13 |
| 9877627 | Ecologically efficient vacuuming device | Ralf Sauer | 2018-01-30 |