Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883292 | Corrosion resisting steel pipe and method of manufacturing same | — | 1989-11-28 |
| 4795078 | Method for producing a clad steel pipe | Toshio Yoshida | 1989-01-03 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883292 | Corrosion resisting steel pipe and method of manufacturing same | — | 1989-11-28 |
| 4795078 | Method for producing a clad steel pipe | Toshio Yoshida | 1989-01-03 |