Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7121766 | Inflatable underground structure liner | Hans De Bruijn | 2006-10-17 |
| 6540438 | Inflatable underground structure liner | Hans De Bruijn | 2003-04-01 |
| 6540439 | Junction seal between a liner of an underground structure and a penetrating pipe | Hans De Bruijn | 2003-04-01 |