Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12388630 | Quantum key distribution system and operation method thereof | Kyongchun LIM, Chun Ju Youn, Minchul Kim, Byung Seok Choi | 2025-08-12 |
| 12375183 | Beam tracking module, free-space quantum communication device, and free-space optical communication device | Minchul Kim, Chun Ju Youn, Kap-Joong Kim, Kyoungchun Lim, Byung Seok Choi | 2025-07-29 |
| 12228777 | Optical alignment device | Duk Jun Kim, Chun Ju Youn | 2025-02-18 |
| 11860376 | Polarization decomposition device | Kap-Joong Kim, Chun Ju Youn, Heasin Ko, Byung Seok Choi | 2024-01-02 |
| 11770245 | Quantum key distribution system and operation method thereof | Kyongchun LIM, Chun Ju Youn, Byung Seok Choi, Young Ho Ko, Kap-Joong Kim +2 more | 2023-09-26 |
| 11522618 | Quantum information transmitter, quantum communication system including the same, and operating method of quantum information transmitter | Kyongchun LIM, Chun Ju Youn, Young Ho Ko, Kap-Joong Kim, Minchul Kim +1 more | 2022-12-06 |
| 11500150 | Waveguide photodetector | Duk Jun Kim, Jong-Hoi Kim, Jonghyurk Park, Won Seok Han | 2022-11-15 |
| 9893810 | Receiver optical module | Seo Lee, Young-Tak Han, Jong-Hoi Kim, Chun Ju Youn, Hyun Do Jung | 2018-02-13 |
| 9864104 | Blend prepared by mixing a prepolymer and a vinyl monomer and a polymer sheet obtained therefrom | Seung Koo Park, Jung Jin Ju, Suntak Park, Jong Moo Lee, Min Su Kim +1 more | 2018-01-09 |
| 9710231 | Multiple output quantum random number generator | Chun Ju Youn, Jong-Hoi Kim | 2017-07-18 |
| 9270381 | Method and apparatus for transmitting and receiving coherent optical OFDM | Chun Ju Youn, Yong-Hwan Kwon, Duk Jun Kim, Jong-Hoi Kim, Kwang-Seong Choi +1 more | 2016-02-23 |
| 9201169 | Compound containing crosslinkable moieties, prepolymer, blend and polymer sheet obtained therefrom, and waveguide for optical interconnection | Seung Koo Park, Jung Jin Ju, Suntak Park, Jong Moo Lee, Min Su Kim +1 more | 2015-12-01 |
| 9166680 | Apparatus and method for measuring IQ imbalance for optical receiver | Chun Ju Youn, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam | 2015-10-20 |
| 9031421 | Measuring device and method of measuring signal transmission time difference thereof | Chun Ju Youn, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Kwang-Seong Choi +1 more | 2015-05-12 |
| 8929731 | Apparatus for measuring performance of coherent optical receiver | Chun Ju Youn, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam | 2015-01-06 |
| 8716403 | Prepolymer prepared by a condensation reaction and a polymer sheet obtained therefrom | Seung Koo Park, Jung Jin Ju, Suntak Park, Jong Moo Lee, Min Su Kim +1 more | 2014-05-06 |
| 8693459 | Polarization division multiplexed optical orthogonal frequency division multiplexing transmitter and receiver | Chun Ju Youn, Yong-Hwan Kwon, Jong-Hoi Kim, Kwang-Seong Choi, Kyoungwoo Heo +1 more | 2014-04-08 |
| 8521040 | Optical orthogonal frequency division multiplexing receiver and optical signal receiving method thereof | Chun Ju Youn, Yong-Hwan Kwon, Eun Soo Nam, Jong-Hoi Kim, Kwang-Seong Choi | 2013-08-27 |
| 8272789 | Adapter assembly and method for compensating optical fibers for length difference | Yong-Hwan Kwon, Chun Ju Youn, Jong-Hoi Kim, Kwang-Seong Choi, Eun Soo Nam | 2012-09-25 |
| 8244079 | Light emitting device and optical coupling module | Jin Tae Kim, Sun Tak Park, Jung Jin Ju, Seung Koo Park, Min Su Kim +1 more | 2012-08-14 |
| 7331723 | Enhanced coplanar waveguide and optical communication module using the same | Ho Gyeong Yoon, Kwang-Seong Choi, Yong-Hwan Kwon | 2008-02-19 |
| 7324258 | Semiconductor optical modulator integrated resistor for impedance matching using semiconductor doped layer and method of fabricating the same | Yong-Hwan Kwon | 2008-01-29 |
| 7005687 | Photodetector | Yong-Hwan Kwon | 2006-02-28 |