Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6779563 | Method and tube for lining a high pressure pipe | Siegfried Schwert, Georg M. Mair, Peter Marquardt | 2004-08-24 |
| 6129119 | Flexible tube for lining pipes and ducts as well as method and an apparatus for manufacturing thereof | Siegfried Schwert, Andre Rose, Peter Marquardt, Wolf Rabold | 2000-10-10 |
| 6050300 | Method and an apparatus for lining a pipe or duct | Siegfried Schwert, Andre Rose, Peter Marquardt, Wolf Rabold | 2000-04-18 |