Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6874791 | Chuck apparatus | Tsai-Ching Chen | 2005-04-05 |
| 6637755 | Chuck device for miniature tool bits | Tsai-Ching Chen | 2003-10-28 |
| D476204 | Wrench | — | 2003-06-24 |
| 6490955 | Screwdriver shank with a universal joint | Mei-Chen Wang | 2002-12-10 |
| 6446341 | Tool holder and tools combination | Mei-Chen Wang | 2002-09-10 |
| 6325393 | Chuck device for tools | Tsai-Ching Chen | 2001-12-04 |
| 6270085 | Chuck device for tool bits | Tsai-Ching Chen | 2001-08-07 |
| 6134788 | Tool holder | Tsai-Ching Chen | 2000-10-24 |