Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12318971 | Mold for partially shortening circumference of tube billet and using method of mold | Lei Sun, Anying Yuan | 2025-06-03 |
| 12257617 | Preforming method for high-strength steel variable-diameter tubular part | Lei Sun, Wencai Xie, Cunsheng Zhang, Anying Yuan, Gang Fang +1 more | 2025-03-25 |
| 11229940 | Method for manufacturing combined hollow camshaft by axial-compression upsetting-deformation technique | Lei Sun | 2022-01-25 |
| 9808850 | Process for forming hollow member with complicated cross-section | Yanli Lin, Shijian Yuan | 2017-11-07 |