Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D474387 | Keyless drill chuck | Daniel Alex Chunn, Felix Leung | 2003-05-13 |
| D472443 | Keyless drill chuck | Daniel Alex Chunn, Felix Leung | 2003-04-01 |
| D462249 | Keyless drill chuck | Daniel Alex Chunn, Felix Leung, Benson Chun Kit Cheung | 2002-09-03 |
| D461696 | Keyless drill chuck | Daniel Alex Chunn, Felix Leung, Benson Chun Kit Cheung | 2002-08-20 |
| D461697 | Keyless drill chuck | Daniel Alex Chunn, Felix Leung | 2002-08-20 |