Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997303 | Eccentric dowel pin and pin-adjusted structure in hole type modular tooling systems | Changxiang Xu, Qiulin Yu | 1991-03-05 |
| 4961268 | Modular method and system for setting fixed-angles of modular tools | Changxiang Xu, Oiulin Yu | 1990-10-09 |