Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8184520 | Optical pickup device having chromatic aberration correction lens | Tae Kyung Kim, Young-man Ahn, Chong-sam Chung | 2012-05-22 |
| 7440361 | Optical pickup apparatus | Jin Won Lee, Kwang Soo Kim, Seok-jung Kim, Chong-sam Chung, Jong-Chul Choi | 2008-10-21 |
| 7391704 | Optical pickup device having chromatic aberration correction lens | Tae Kyung Kim, Young-man Ahn, Chong-sam Chung | 2008-06-24 |
| 7170834 | Method and circuit for detecting playback signal which is compensated for time delay | Tatsuhiro Otsuka, Seong-sin Joo, Chong-sam Chung, Young-man Ahn, In-sik Park +2 more | 2007-01-30 |
| 7120109 | Optical pickup with improved collimating lens for use with long and short wavelength laser beams | Tae Kyung Kim, Chong-sam Chung, Young-man Ahn | 2006-10-10 |
| 7092347 | Optical pickup apparatus having disk thickness deviation correction and method therefor | Tae Kyung Kim, Chong-sam Chung, Young-man Ahn | 2006-08-15 |
| 7009921 | Method and circuit for detecting playback signal which is compensated for time delay | Tatsuhiro Otsuka, Seong-sin Joo, Chong-sam Chung, Young-man Ahn, In-sik Park +2 more | 2006-03-07 |
| 6987724 | Optical pickup device having chromatic aberration correction lens | Tae Kyung Kim, Young-man Ahn, Chong-sam Chung | 2006-01-17 |
| 6853614 | Aberration correction element and optical pickup adopting the same | Tae Kyung Kim, Young-man Ahn, Chong-sam Chung | 2005-02-08 |
| 6798731 | Optical pickup for and method of correcting aberration due to thickness variations of optical media | Tae Kyung Kim, Chong-sam Chung, Young-man Ahn | 2004-09-28 |
| 6788473 | Objective lens device for correcting chromatic aberration and optical pickup employing the same | Tae Kyung Kim, Young-man Ahn, Chong-sam Chung | 2004-09-07 |
| 6785209 | Optical pickup for improving properties of a reproduction signal | Chong-sam Chung, Tae Kyung Kim, Young-man Ahn | 2004-08-31 |
| 6724710 | Spherical abberation compensator and optical pickup using the same | Chong-sam Chung, Young-man Ahn, Tae Kyung Kim, Jong-bae Kim | 2004-04-20 |
| 6678233 | Objective lens and optical pickup device using the same | Chong-sam Chung, Tae Kyung Kim, Young-man Ahn | 2004-01-13 |
| 6665247 | Land/groove discriminating method and optical recording/reproducing apparatus employing the method | Young-man Ahn, Chong-sam Chung, Tae Kyung Kim, Jong-bae Kim | 2003-12-16 |
| 6646976 | Optical pickup apparatus capable of reducing cross talk by adjacent tracks and a method therefor | Chong-sam Chung, Young-man Ahn, Tae Kyung Kim, Seung-tae Jung, Chul-woo Lee +2 more | 2003-11-11 |
| 6590851 | Optical pickup for recording/reproducing optical discs of multiple thicknesses | Tae Kyung Kim, Chong-sam Chung, Young-man Ahn | 2003-07-08 |
| 6580670 | Optical pickup using a single light spot to generate tracking error signal and reproduction signal | Tae Kyung Kim, Chong-sam Chung, Young-man Ahn | 2003-06-17 |
| 6563780 | Compatible optical pickup for high-density recording/reproduction | Tae Kyung Kim, Chong-sam Chung, Young-man Ahn | 2003-05-13 |
| 6538975 | Optical pickup | Chong-sam Chung, Young-man Ahn | 2003-03-25 |