Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8678776 | Vacuum generating device and method for the operation thereof | Ralf Medow, Yvonne Krehl | 2014-03-25 |
| 6899198 | Compressed air muffler | Manfred Zindl, Yvonne Krehl | 2005-05-31 |