Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE42062 | Battery charger for cellular phone, having speaker | — | 2011-01-25 |
| 6509716 | Battery charger for cellular phone, having speaker | — | 2003-01-21 |
| 6407325 | Background music play device and method thereof for mobile station | Du-Hyun Yoon | 2002-06-18 |