Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4282047 | Method of producing steel pipe material for oil well | Mitsukuni Yamagata, Keiichiro Takitani, Sadao Hasuno | 1981-08-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4282047 | Method of producing steel pipe material for oil well | Mitsukuni Yamagata, Keiichiro Takitani, Sadao Hasuno | 1981-08-04 |