Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9863441 | Cleaning device generating two suction flows | Alexander Siegfanz, Christian Stehl, Sabrina Hoffmann, Miron Sernecki | 2018-01-09 |
| 9687131 | Self-propelled floor cleaning device comprising a consecutive vehicle, which follows a lead vehicle | Sabrina Hoffmann | 2017-06-27 |