Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7148818 | Method of command entry for an electronic device | Kun-Chang Chang, Chien-Chun Ma | 2006-12-12 |
| 6820147 | Bidirectional signal transmission of earphone jack for disc drive | Chien-Chun Ma | 2004-11-16 |