Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5826887 | Sealing device | Wieland Neumann, Bent Holmen, Ulf Nilsson, Elvir Cavka, Soren Forsberg +3 more | 1998-10-27 |
| 5599028 | Seal between two elements, especially between concrete pipes | Wieland Neumann | 1997-02-04 |
| 5507504 | Sealing device with c-shaped lips and central projection | Wieland Neumann, Anders Strom, Joakim Andersson | 1996-04-16 |