Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12388630 | Quantum key distribution system and operation method thereof | Kyongchun LIM, Joong-Seon Choe, 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, Kap-Joong Kim, Kyoungchun Lim, Byung Seok Choi, Joong-Seon Choe | 2025-07-29 |
| 12228777 | Optical alignment device | Joong-Seon Choe, Duk Jun Kim | 2025-02-18 |
| 11860376 | Polarization decomposition device | Kap-Joong Kim, Heasin Ko, Byung Seok Choi, Joong-Seon Choe | 2024-01-02 |
| 11770245 | Quantum key distribution system and operation method thereof | Kyongchun LIM, Byung Seok Choi, Young Ho Ko, Kap-Joong Kim, Minchul 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, Young Ho Ko, Kap-Joong Kim, Minchul Kim, Byung Seok Choi +1 more | 2022-12-06 |
| 9893810 | Receiver optical module | Seo Lee, Young-Tak Han, Jong-Hoi Kim, Joong-Seon Choe, Hyun Do Jung | 2018-02-13 |
| 9710231 | Multiple output quantum random number generator | Joong-Seon Choe, Jong-Hoi Kim | 2017-07-18 |
| 9270381 | Method and apparatus for transmitting and receiving coherent optical OFDM | Yong-Hwan Kwon, Duk Jun Kim, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi +1 more | 2016-02-23 |
| 9166680 | Apparatus and method for measuring IQ imbalance for optical receiver | Jong-Hoi Kim, Joong-Seon Choe, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam | 2015-10-20 |
| 9031421 | Measuring device and method of measuring signal transmission time difference thereof | Joong-Seon Choe, 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 | Joong-Seon Choe, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam | 2015-01-06 |
| 8693459 | Polarization division multiplexed optical orthogonal frequency division multiplexing transmitter and receiver | Yong-Hwan Kwon, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi, Kyoungwoo Heo +1 more | 2014-04-08 |
| 8521040 | Optical orthogonal frequency division multiplexing receiver and optical signal receiving method thereof | Yong-Hwan Kwon, Eun Soo Nam, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi | 2013-08-27 |
| 8477939 | Polarization-insensitive one-way quantum key distribution receiver, transmitter/receiver system | Tae-Gon Noh | 2013-07-02 |
| 8272789 | Adapter assembly and method for compensating optical fibers for length difference | Joong-Seon Choe, Yong-Hwan Kwon, Jong-Hoi Kim, Kwang-Seong Choi, Eun Soo Nam | 2012-09-25 |
| 8265279 | Polarization coding quantum cryptography system | Tae-Gon Noh | 2012-09-11 |
| 8116636 | Transceiver and method for high-speed auto-compensating quantum cryptography | Tae-Gon Noh, Jong Cheol Hong, Heon Oh Kim, Taehyoung Zyung | 2012-02-14 |
| 8068484 | Method for void-filling and transmitting burst data over optical burst switching network | Young-kwang Seo, Hyun-chin Kim, Keun Joo Park, June-Koo Rhee | 2011-11-29 |
| 7933520 | High-speed wavelength selectable optical source and method thereof | Hyun-chin Kim, Yeong Bae YEO, Young-kwang Seo, Keun Joo Park | 2011-04-26 |
| 7844185 | Method and apparatus for suppressing optical surge in optical burst switching network | Keun Joo Park, Hyun-chin Kim, June-Koo Rhee, Young-kwang Seo | 2010-11-30 |
| 7769293 | Apparatus and method for label transmission in optical packet data switching network | Keun Joo Park, Hyun-chin Kim, Young-kwang Seo, June-Koo Rhee | 2010-08-03 |
| 7539415 | Optical packet communication system using labeling of wavelength-offset polarization-division multiplexing | Keun Joo Park, Hyun-chin Kim, June-Koo Rhee, Young-kwang Seo | 2009-05-26 |
| 7257324 | Apparatus for monitoring optical signal-to-noise ratio | Yun Chur Chung, Keun Joo Park, Jun Haeng Lee | 2007-08-14 |
| 7095551 | Wavelength converter for generating wavelength tunable laser optical source in itself | Young-kwang Seo, Hyun-chin Kim, Hyun Surk Ryu, June-Koo Rhee, Keun Joo Park | 2006-08-22 |