Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11796092 | Double-wall spiral welded pipe and manufacturing method thereof | — | 2023-10-24 |
| 10648152 | Box-type pipeline with circumferential obtuse angle connection | — | 2020-05-12 |
| 10145502 | Large-aperture spiral welded steel pipe with metal linings and manufacturing method thereof | — | 2018-12-04 |
| 10030792 | Underground steel-concrete structure pipeline with spiral composite reinforcement ring on inner wall and manufacturing method thereof | — | 2018-07-24 |