Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6325393 | Chuck device for tools | Chiu-Man Chang-Kao | 2001-12-04 |
| 6270085 | Chuck device for tool bits | Chiu-Man Chang-Kao | 2001-08-07 |
| 6206160 | Ratchet transmission control mechanism for a ratcheting tool | — | 2001-03-27 |
| 6134788 | Tool holder | Chiu-Man Chang-Kao | 2000-10-24 |
| D422870 | Handle of tool | — | 2000-04-18 |
| D410145 | Tool box | — | 1999-05-25 |