Issued Patents 2020
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10752979 | Low alloy oil-well steel pipe | Keiichi Kondo | 2020-08-25 |
| 10655200 | Steel material and oil-well steel pipe | Kengo Hata | 2020-05-19 |
| 10563793 | Low alloy oil-well steel pipe | Keiichi Kondo | 2020-02-18 |
| 10550962 | Steel material and oil-well steel pipe | — | 2020-02-04 |