Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7961176 | Input apparatus and method using optical sensing, and portable terminal using the same | — | 2011-06-14 |
| 7715804 | Keypad display method and apparatus of portable device | Sung-Chul Yang | 2010-05-11 |