Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D637099 | Door chime | Yong-Kong Khor | 2011-05-03 |
| D636286 | Bell push for a door chime | Yong-Kong Khor | 2011-04-19 |
| D636287 | Door chime | Yong-Kong Khor | 2011-04-19 |
| D531070 | Global positioning system navigator | Chia-Hwa Lee | 2006-10-31 |