Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9927921 | Infrared touch screen device | — | 2018-03-27 |
| 8154997 | Communication signal processing apparatus for repeater | Ri Hong Lee, Sang Seob Lee, Sang-Hoon Oh | 2012-04-10 |
| 7808933 | Cascade-type multiplex radio communication relay system | Ri Hong Lee, Sang Seob Lee, Sang-Hoon Oh, Byung-sun Ahn | 2010-10-05 |
| 7257123 | Gateway having bypassing apparatus | In Ho Choi, Young Kwon, Yong-Seog Pahn | 2007-08-14 |