Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9448270 | Pulse injection apparatus | Up NAMKOONG, Seung-Kab RYU, Uijung KIM | 2016-09-20 |
| 9190722 | Antenna line protection device | Seung-Kab RYU, Kyung-Hoon Lee, Uijung KIM, Up NAMKOONG | 2015-11-17 |
| 8994471 | Stacked diode limiter | Seung-Kab RYU, Kyung-Hoon Lee, Uijung KIM, Up NAMKOONG | 2015-03-31 |
| 8987610 | Vent structure for electromagnetic shielding | Ui-Jung KIM, Jong Kyu Kim, Dae Heon LEE | 2015-03-24 |
| 8693710 | Apparatus for preventing leakage of a weak signal from a speaker | In Ho Hwang | 2014-04-08 |
| 8681467 | Surge protection apparatus and method using the same | Up NAMKOONG, Kyung-Hoon Lee | 2014-03-25 |
| 7920822 | Device for preventing eavesdropping through speaker | In Ho Hwang, Jong Kyu Kim, Sang-Woo Cho, Dae Heon LEE | 2011-04-05 |
| 7646978 | Methods and apparatuses to provide a wavelength division-multiplexing passive optical network based on wavelength-locked wavelength-division-multiplexed light sources | Chang Hee Lee, Tae Won Oh | 2010-01-12 |
| 7593647 | Apparatuses and methods for automatic wavelength locking of an optical transmitter to the wavelength of an injected incoherent light signal | Chang Hee Lee, Bong-Soo Kim | 2009-09-22 |
| 7469102 | Wavelength-division-multiplexing passive optical network utilizing fiber fault detectors and/or wavelength tracking components | Chang Hee Lee | 2008-12-23 |
| 7171123 | Method for decreasing and compensating the transmission loss at a wavelength-division-multiplexed passive optical network and an apparatus therefor | Chang Hee Lee, Tae Won Oh | 2007-01-30 |
| 6977731 | Method and apparatus for enhancing the resolving power of a tunable optical filter | Chang Hee Lee | 2005-12-20 |
| 6671045 | Apparatus and method for measuring optical signal-to-noise ratio | Chang Hee Lee, Sang Yung Shin | 2003-12-30 |
| 6396574 | Apparatus for measuring the wavelength, optical power and optical signal-to-noise ratio of each optical signal in wavelength-division multiplexing optical communication | Chang Hee Lee, Sang Yung Shin | 2002-05-28 |
| 5651080 | Optical exchanging apparatus using mode conversion and mode selection in an optical waveguide | Yong Hyub Won | 1997-07-22 |
| 5574586 | Simultaneous optical compression and decompression apparatus | Byeong Hyeon KIM, Seo-Young Shin, Ki Hyun Kim, Yong Hyub Won | 1996-11-12 |