Cui; Xiaojie
Patent Applications and Registrations
Patent applications and USPTO patent grants for Cui; Xiaojie.The latest application filed is for "downhole auxiliary drilling apparatus".
- Cui; Xiaojie - Beijing CN
| Patent | Date |
|---|---|
| Downhole auxiliary drilling apparatus Grant 10,927,612 - Zeng , et al. February 23, 2 | 2021-02-23 |
| Downhole Auxiliary Drilling Apparatus App 20190330931 - ZENG; Yijin ; et al. | 2019-10-31 |
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