Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5335841 | Method of manufacturing welded pipe with excellent corrosion-resistant inner surface | — | 1994-08-09 |
| 5312026 | Welded tube with excellent corrosion-resistant inner surface and method of producing the same | — | 1994-05-17 |
| 5277228 | Welded pipe with excellent corrosion resistance inner surface | — | 1994-01-11 |