Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12006676 | Drainage body unit, drainage body system and shaft element | Stefan Prakesch, Anja Sievers | 2024-06-11 |
| 11851855 | Drainage system and drain | Brunhild Schmidtke | 2023-12-26 |
| 10465344 | Covering device for a slotted channel | Ramon Bhatia, Jiri Krcil, Jan Mieze | 2019-11-05 |
| 7524133 | Surface water drainage system | Michael Sieber, Markus Blaschke, Arne Stoltenberg | 2009-04-28 |
| 7144185 | Street grid for surface drainage | Michael Sieber | 2006-12-05 |
| 7059804 | Drainage device | Michael Sieber, Markus Blaschke, Arne Stoltenberg | 2006-06-13 |
| 5518336 | Drainage gutter and method of installing | Wolfgang Arm | 1996-05-21 |