Issued Patents 2016
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9447658 | Chemical injection mandrel pressure shut off device | Zhi Yong He | 2016-09-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9447658 | Chemical injection mandrel pressure shut off device | Zhi Yong He | 2016-09-20 |