Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39025 | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | Chul-woo Lee, Dong-Ho Shin, Chong-sam Chung, Kun-ho Cho, Pyong-yong Seong +2 more | 2006-03-21 |
| 5987924 | Lens mold and method of manufacturing a lens | Chul-woo Lee, Dong-Ho Shin, Chong-sam Chung, Kun-ho Cho, Pyong-yong Seong +2 more | 1999-11-23 |
| 5986993 | Optical pickup device having a diaphram with a predetermined aperture | Jang-hoon Yoo, Chul-woo Lee | 1999-11-16 |
| 5907530 | Optical pickup device | Kun-ho Cho, Eung-Ho Kim, Jang-hoon Yoo | 1999-05-25 |
| 5822135 | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | Chul-woo Lee, Dong-Ho Shin, Chong-sam Chung, Kun-ho Cho, Pyong-yong Seong +2 more | 1998-10-13 |
| 5805556 | Optical pickup apparatus having a holographic optical element | Chul-woo Lee, Jang-hoon Yoo, Yong-hoon Lee | 1998-09-08 |
| 5802037 | Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses | Chul-woo Lee, Chong-sam Chung, Kun-ho Cho, Jang-hoon Yoo, Soo Jung | 1998-09-01 |
| 5777973 | Reproducing and recording optical pickup compatible with discs having different thicknesses | Jang-hoon Yoo, Chong-sam Chung, Chul-woo Lee, Kun-ho Cho | 1998-07-07 |
| 5734512 | Dual-focus objective lens of optical pickup | Dong-Ho Shin, Chul-woo Lee | 1998-03-31 |
| 5706263 | Method and apparatus for high-density reproduction | Chul-woo Lee | 1998-01-06 |
| 5699339 | Inverse image generating method apparatus thereof and focus error detecting method using the same and apparatus thereof | Chul-woo Lee, Chong-sam Chung, Jang-hoon Yoo | 1997-12-16 |
| 5665957 | Lens device comprising light blocking means and an optical pickup apparatus using the lens device | Chul-woo Lee, Dong-Ho Shin, Chong-sam Chung, Kun-ho Cho, Pyong-yong Seong +2 more | 1997-09-09 |
| 5629514 | Critical angle focus error detector | Chul-woo Lee, Chong-sam Chung, Jang-hoon Yoo | 1997-05-13 |
| 5594714 | Focus error detection with two symmetrically splitted reflected beams | Chul-woo Lee, Pyong-yong Seong, Chong-sam Chung | 1997-01-14 |
| 5587976 | Optical pickup for optical magnetic disc | Jang-hoon Yoo, Chong-sam Chung, Chul-woo Lee | 1996-12-24 |
| 5537384 | Focus error detector | Chul-woo Lee, Chong-sam Chung, Jan-hoon Yoo | 1996-07-16 |
| 5526336 | Optical pickup for optical disk having multiple recording layers | Tai-suk Park, Chul-woo Lee | 1996-06-11 |