Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666846 | Extrusion apparatus for making seamless tubes from hollow billets | Chin-Fu Chen, Shan-Chang Chueh | 1997-09-16 |
| 5533375 | Method for making seamless tubes from hollow billets | Chin-Fu Chen, Shan-Chang Chueh | 1996-07-09 |