Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12223939 | Noise reduction method and noise reduction apparatus | Zhiheng Cai | 2025-02-11 |
| 12018529 | Spiral magnetic fluid composite sealing structure of roller bit | Yi Zhou, Fuxiao Zhang, Xinlin Lei, Wenchao Song | 2024-06-25 |