Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8978735 | Thixotropic injector with improved annular trap | Chang-Qing Zheng | 2015-03-17 |
| 8376026 | Thixotropic injector with improved annular trap | Chang-Qing Zheng | 2013-02-19 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8978735 | Thixotropic injector with improved annular trap | Chang-Qing Zheng | 2015-03-17 |
| 8376026 | Thixotropic injector with improved annular trap | Chang-Qing Zheng | 2013-02-19 |