Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6450392 | Groove shape for single butt welding and inspection method of weld zone thereof | Koji Nakamura | 2002-09-17 |
| 6371359 | Stainless steel pipe and joining method thereof | Koji Nakamura | 2002-04-16 |