Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7217379 | Thermoplastic tube | Jan Hendrik Prenger, Jan Visscher | 2007-05-15 |
| 7069635 | Methods and devices for the production of a pipe from biaxialy oriented thermoplastic material having an integrated socket | Jan Visscher, Duncan Hamilton Wormald, Jan Hendrik Prenger | 2006-07-04 |
| 6726863 | Thermoplastic tube | Jan Hendrik Prenger, Jan Visscher | 2004-04-27 |