Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D440480 | Screw driver | — | 2001-04-17 |
| 6059083 | Ratchet mechanism | — | 2000-05-09 |
| 5957014 | Tool combination having two sections | Ghi Chung Wang, Kuo-Chen Liu | 1999-09-28 |
| 5829325 | Screwdriver | — | 1998-11-03 |