Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7903093 | Mobile communication device equipped with touch screen and method of controlling operation thereof | Tae Hun Kim | 2011-03-08 |
| 5531124 | Ultrasonic flow measuring method and apparatus thereof | Hak Soo Chang, Jong S. Paik | 1996-07-02 |
| 5515721 | Local river flow velocity measuring method and apparatus therefor | Hak Soo Chang, Kyung-Ah Park | 1996-05-14 |
| D291202 | Computer monitor | Youn-Han Chang | 1987-08-04 |