Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12385586 | Compression teeth ring connection pipe fitting | Zhou Qingnian | 2025-08-12 |
| 11873924 | Thick-wall compression fitting | Zhou Qingnian | 2024-01-16 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12385586 | Compression teeth ring connection pipe fitting | Zhou Qingnian | 2025-08-12 |
| 11873924 | Thick-wall compression fitting | Zhou Qingnian | 2024-01-16 |