Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644150 | Tool bit holding device with an improved retaining effect | — | 2003-11-11 |
| 6637755 | Chuck device for miniature tool bits | Chiu-Man Chang-Kao | 2003-10-28 |
| D479253 | Chuck | — | 2003-09-02 |