Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5688420 | Low-hydrogen-type covered arc welding electrode for high strength CR-MO steels | Takeshi Nakagawa | 1997-11-18 |
| 5430269 | Submerged arc welding method for high strength Cr-Mo steel | Syogo Natsume, Takeshi Nakagawa | 1995-07-04 |