Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11293072 | Process for on-line quenching of seamless steel tube using residual heat and manufacturing method | Zhonghua Zhang, Ke Xu | 2022-04-05 |
| 11203794 | Method for manufacturing bainite high-strength seamless steel tube, and bainite high-strength seamless steel tube | Zhonghua Zhang, Xiaobo Wang | 2021-12-21 |
| 11015232 | Seamless steel tube with high strength and toughness and manufacturing method therefor | Zhonghua Zhang | 2021-05-25 |