Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6134842 | Integrated window/light shelf system | Chi-Wen Cheng | 2000-10-24 |
| 5893318 | Ball bearing piston and liner | Chi-Han Cheng | 1999-04-13 |
| 5615600 | Roller bearing piston | Chi-Han Cheng | 1997-04-01 |