Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6789318 | Method for producing longitudinally welded helically corrugated metal tubing | Christian Frohne, Friedrich Harten | 2004-09-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6789318 | Method for producing longitudinally welded helically corrugated metal tubing | Christian Frohne, Friedrich Harten | 2004-09-14 |