Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5325693 | Apparatus for the continuous production of helical or annular corrugated metal tubes | Ernst Hoffmann, Harry Staschewski | 1994-07-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5325693 | Apparatus for the continuous production of helical or annular corrugated metal tubes | Ernst Hoffmann, Harry Staschewski | 1994-07-05 |