Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6993819 | Method of producing a joint between a corrugated tube and a coupling | — | 2006-02-07 |
| 5738385 | Device for joining the end of a helically corrugated metal tube to another body | Hartmut Krüger | 1998-04-14 |