Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9663840 | 500 MPA grade longitudinally-welded steel pipe with low yield ratio and manufacturing method therefor | Qingchao Tian, Hongde Shi, Qijiang Wang | 2017-05-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9663840 | 500 MPA grade longitudinally-welded steel pipe with low yield ratio and manufacturing method therefor | Qingchao Tian, Hongde Shi, Qijiang Wang | 2017-05-30 |