Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10520140 | Substrate structure for LED lighting | Young Hun Ko, Ui-Chung Hong | 2019-12-31 |
| 10327314 | System for integrated remote control of wireless lighting device and wireless electric and electronic devices in wireless network environment | Won Jae Choi, Yong-Chul Song, Sang Yeol Park | 2019-06-18 |
| 9615419 | AC LED driving circuit | — | 2017-04-04 |
| 9603215 | AC LED driving circuit | Ok Hwan KWON | 2017-03-21 |
| 9144128 | Dimming system of lamp using light-emitting device | Ok Hwan KWON | 2015-09-22 |
| 8686649 | Device for driving light emitting diode | Wanyuan Qu, Won Ji Lee, Yong Goo Kim, Ok Hwan KWON, Gyeong Sik Mun +1 more | 2014-04-01 |
| 7535308 | Voltage-controlled oscillator decreasing phase noise | Tae Hun Kim | 2009-05-19 |
| 7304548 | Differential voltage controlled oscillator using complementary transistors cross-coupled in series, and transceiver using the same | Sang-Gug Lee, Seok Ju YUN | 2007-12-04 |
| 7199675 | Source-injection parallel coupled LC-quadrature voltage controlled oscillator | Sang-Gug Lee, Hyoung-Chul Choi | 2007-04-03 |