Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8776307 | Air volume flow and pushing force control device | Detlef Schulz, Rudolf Hermann, Roland Illig, Peter Lehmann, Silvio Hamm | 2014-07-15 |
| 7472454 | Vacuum cleaner comprising a cable compartment | Silvio Hamm, Roland Illig | 2009-01-06 |