Issued Patents 2019
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10329648 | Method for manufacturing superior 13Cr thickened drillrod | Peng Zhao, Yanpeng Song, Jianwei Zhang, Chunxia Zhang | 2019-06-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10329648 | Method for manufacturing superior 13Cr thickened drillrod | Peng Zhao, Yanpeng Song, Jianwei Zhang, Chunxia Zhang | 2019-06-25 |