Issued Patents All Time
Showing 26–50 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7068933 | Apparatus and method for detecting beam power in optical drive | Jong-koog Lee, Kun-soo Kim, Yong-jun Cho, Sung-du Kwon | 2006-06-27 |
| RE39025 | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho +2 more | 2006-03-21 |
| 7016291 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Jang-hoon Yoo, Chul-woo Lee, Kun-ho Cho | 2006-03-21 |
| 6985293 | Optical pickup using an optical phase plate and which is compatible with optical media for different types | Jang-hoon Yoo, Chul-woo Lee, Chong-sam Chung, Kun-ho Cho, Hyun-seob Choi +3 more | 2006-01-10 |
| 6873592 | Slim optical pickup apparatus | Cheol-sung Yeon | 2005-03-29 |
| 6791933 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Chong-sam Chung, Kun-ho Cho, Hyun-seob Choi +3 more | 2004-09-14 |
| 6765857 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Jang-hoon Yoo, Chul-woo Lee, Kun-ho Cho | 2004-07-20 |
| 6728177 | Method of recording data on optical disc at high multiple speed and apparatus thereof | Kyu Hwan Jung | 2004-04-27 |
| 6686697 | Circuit to protect a light element | Myoung-cheol Cho, Byung-ryul Ryoo, Kyung-ui Park, Ui-yol Kim | 2004-02-03 |
| 6636464 | Optical pickup device capable of detecting stable error signal | Yong Jae Lee, Jang-hoon Yoo, Byung-ryul Ryoo, Yong-Ki Son | 2003-10-21 |
| 6587481 | Light emitting module and compatible optical pickup device adopting the same | Yong Jae Lee, Byung-ryul Ryoo, Yong-Ki Son | 2003-07-01 |
| 6567366 | Optical pickup using laser light of different wavelengths to record and reproduce information to/from a disk | Tae Kyung Kim, Chul-woo Lee | 2003-05-20 |
| 6480222 | Semiconductor laser and flying optical pickup for recording/reproducing using the same | Chul-woo Lee, Jang-hoon Yoo | 2002-11-12 |
| 6449241 | Optical disk | Jung-wan Ko, In-sik Park | 2002-09-10 |
| 6449237 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Jang-hoon Yoo, Chul-woo Lee, Kun-ho Cho | 2002-09-10 |
| 6449229 | Optical pickup assembly with adjustable inclination | Seok-jung Kim, Byung-ryul Ryoo, Yong-Ki Son, Yong Jae Lee, Tae Kyung Kim +1 more | 2002-09-10 |
| 6400658 | DVD-RAM disk reproduction apparatus for reducing errors during detection of identification data | Chang-jin Yang, Seong-sin Joo, Soo-yul Jung, Jung-Eon Seo, Yong Jae Lee +2 more | 2002-06-04 |
| 6381207 | Optical pickup movable to control beam shift and field angle in an optical disk drive | Byung-ryul Ryoo, Seok-jung Kim, Yong-Ki Son, Tae Kyung Kim, Yong Jae Lee +1 more | 2002-04-30 |
| 6337841 | Compatible optical pickup | Kun-soo Kim, Jong-ryull Kim, Myoung Soo Choi, Hyung-taek Oh, Jong-hwa Yu +3 more | 2002-01-08 |
| 6295255 | Optical pickup having a tilt mechanism to adjust an optical axis of an incident light beam | Young-sun Seo, Han-kook Choi, In-sik Park, Hee-deuk Park, Young-min Cheong +1 more | 2001-09-25 |
| 6285646 | Optical pickup using objective lens compatible with a plurality of optical disks | Jang-hoon Yoo, Yong Jae Lee, Chul-woo Lee | 2001-09-04 |
| 6282161 | Optical recording and reproducing apparatus, tilt adjusting method appropriate therefor, and recording control method | Yong-Ki Son, Byung-ryul Ryoo, Seok-jung Kim, Joong-eon Seo, In Wook HWANG +1 more | 2001-08-28 |
| 6275461 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Chong-sam Chung, Kun-ho Cho, Hyun-seob Choi +3 more | 2001-08-14 |
| 6272096 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Chong-sam Chung, Kun-ho Cho, Hyun-seob Choi +3 more | 2001-08-07 |
| 6266315 | Catadioptric optical system, optical pickup and optical disk drive employing the same, and optical disk | Chul-woo Lee, Chong-sam Chung, Yong-Moon Lee, Cheol-sung Yeon, Joong-eon Seo +4 more | 2001-07-24 |