Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11729597 | Digital twin disaster management system customized for underground public areas | Woo-Sug Jung, Mi Suk LEE | 2023-08-15 |
| 10447376 | Wireless communication apparatus and method using transmission line for transferring signal | Hak June Lee, Hoe-Sung Yang, Kang Bok Lee | 2019-10-15 |
| 10382894 | Method of measuring inter-device relative coordinates and device using the same | Hoe-Sung Yang, Kang Bok Lee, Jun Ho Jin | 2019-08-13 |
| 9246628 | Hybrid passive optical network system | Seung Hyun CHO, Jie Hyun Lee, Sang Soo Lee, Jong Hyun Lee, Eui Suk Jung +1 more | 2016-01-26 |
| 9225570 | Method of allocating upstream bandwidth resource and method of transmitting upstream data in orthogonal frequency division multiple access-open optical subscriber network | Kyeong Hwan DOO, Hak-Jeon Bang, Seung Hyun CHO, Jie Hyun Lee | 2015-12-29 |
| 9219567 | Converged PON for TDMA-PON service based on OFDMA-PON | Kwang-Ok Kim, Seung Hyun CHO, Jie Hyun Lee, Sang Soo Lee, Jong Hyun Lee | 2015-12-22 |
| 9197351 | Method of selecting wavelength of optical network unit in passive optical network | Kyeong Hwan DOO, Han Hyub Lee, Seung Hyun CHO, Jie Hyun Lee, Sang Soo Lee | 2015-11-24 |
| 9191116 | Orthogonal frequency division multiple access-passive optical network comprising optical network unit and optical line terminal | Seung Hyun CHO, Kyeong Hwan DOO, Jie Hyun Lee, Sang Soo Lee, Jong Hyun Lee | 2015-11-17 |
| 9136941 | Optical layer monitoring apparatus and method thereof | Han Hyub Lee, Eui Suk Jung, Sang Soo Lee | 2015-09-15 |
| 9137850 | Wired/wireless converged MAC adaptor and method of transmitting frame using wired/wireless converged MAC adaptor | Kwang-Ok Kim, Sang Soo Lee, Jong Hyun Lee | 2015-09-15 |
| 9130675 | Signal transmission apparatus and optical modem modulation method | Seung Hyun CHO, Jie Hyun Lee, Kwang-Ok Kim, Eui Suk Jung, Sang Soo Lee +1 more | 2015-09-08 |
| 9091824 | User-selectable laser and optical transmitter having the same | Jie Hyun Lee, Seung Hyun CHO, Kwang-Ok Kim, Eui Suk Jung, Sang Soo Lee | 2015-07-28 |
| 8791857 | System and method for indoor location tracking using pseudo GPS signal transmitter | Sang Hyun Mo, Heyung Sub Lee, Jae Heum Lee, Hoe-Sung Yang, Kang Bok Lee +1 more | 2014-07-29 |
| 8787514 | Apparatus and method for generating pseudo noise code | Jong-Sub Cha, Sang Hyun Mo, Jae Heum Lee, Heyung Sub Lee, Jong-Suk Chae | 2014-07-22 |
| 8767699 | Apparatus and method for transmitting packet data in wireless sensor network | Hyung-Rae Park, Jongsub Cha, Sang Hyun Mo, Heyung Sub Lee, Jong-Suk Chae | 2014-07-01 |
| 8633803 | Apparatus and method for locating RFID tag | Sang Hyun Mo, Jae Heum Lee, Hoe-Sung Yang, Heyung Sub Lee, Jong-Suk Chae +3 more | 2014-01-21 |
| 8442167 | Multistage channel estimation method and apparatus | Hoe-Sung Yang, Dong-Beom Shin, Nak-Seon Seong, Heyung Sub Lee, Cheol Sig Pyo | 2013-05-14 |
| 8422593 | Parallel automatic frequency offset estimation method and apparatus | Jong-Sub Cha, Hoe-Sung Yang, Kang Bok Lee, Heyung Sub Lee, Jong-Suk Chae | 2013-04-16 |
| 8401053 | Active RFID apparatus for improving PN code generation | Jong-Sub Cha, Heyung Sub Lee, Sang Hyun Mo, Jong-Suk Chae | 2013-03-19 |
| 7769303 | Apparatus and method for generating return-to-zero signal | Hyung Joo Kim, Jong Hyun Lee | 2010-08-03 |
| 7471896 | Optical transponder and method for detecting and treating errors in optical channel sublayer of the optical transponder | Yun Hee Cho, Joon Ki LEE, Jyung Chan Lee, Kwangjoon Kim | 2008-12-30 |
| 7366411 | System and method for operating optical transponder | Yun Hee Cho, Jyung Chan Lee, Yool Kwon | 2008-04-29 |
| 7313333 | Apparatus for controlling decision threshold voltage to optical receiver | Jyung Chan Lee, Joon Ki LEE, Kwang Joon Kim | 2007-12-25 |
| 7298978 | Method and apparatus for optimizing decision level of signal output from optical receiver | Jyung Chan Lee, Jin Soo Han, Je Soo Ko | 2007-11-20 |
| 7212741 | Method of optimizing output signal of optical receiver using FEC and optical receiving system using the method | Jyung Chan Lee, Je Soo Ko | 2007-05-01 |