Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8034263 | Multi-layer panel and method of manufacturing such a panel | — | 2011-10-11 |
| 6213833 | Float for buoyant hoses | Hans-Werner Friederich | 2001-04-10 |
| 6009911 | Safety hose | Hans-Werner Friederich, Winfried Hellmig, Peter Zerfowski | 2000-01-04 |
| 5865519 | Device for displaying moving images in the background of a stage | — | 1999-02-02 |
| 5722794 | Float for floating flexible pipes | Hans-Werner Friederich, Winfried Hellmig | 1998-03-03 |