Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457965 | Apparatus for the manufacture of corrugated plastic pipes | — | 2002-10-01 |
| 6458311 | Method for the continuous manufacture of a twin-wall pipe having a pipe socket | — | 2002-10-01 |
| 6343623 | Sealing ring for connecting the spigot of a corrugated pipe with a pipe socket having a smooth inside wall | — | 2002-02-05 |