Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6789318 | Method for producing longitudinally welded helically corrugated metal tubing | Michael Meyer, Friedrich Harten | 2004-09-14 |
| 6685082 | Process for continuous production of longitudinally welded metal tubing | Klaus Porcher | 2004-02-03 |