Issued Patents All Time
Showing 176–200 of 222 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6016293 | Method of discriminating discs having different thickness and optical pickup device adopting the same | Chong-sam Chung, Jang-hoon Yoo | 2000-01-18 |
| 6009066 | Optical pickup of two different wavelength laser sources with an objective lens having an annular shielding region | Jang-hoon Yoo | 1999-12-28 |
| 5991254 | Optical pickup having a multi-coated polarization holographic element | Keon-ho Cho, Chong-sam Chung | 1999-11-23 |
| 5987924 | Lens mold and method of manufacturing a lens | Dong-Ho Shin, Kyung-hwa Rim, 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, Kyung-hwa Rim | 1999-11-16 |
| 5933401 | Optical pickup having plural optical sources and plural optical detectors | Dong-Ho Shin, Chong-sam Chung, Pyeong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 1999-08-03 |
| 5909424 | Optical pickup device and method to read from and record information to disks of different thicknesses | Jang-hoon Yoo | 1999-06-01 |
| 5903536 | Objective lens device, optical pickup adopting the same and method for manufacturing an objective lens | Jang-hoon Yoo | 1999-05-11 |
| 5872760 | Optical pickup for correcting an astigmatic difference of light | Tae Kyoung Kim, Pyong-yong Seong | 1999-02-16 |
| 5870369 | Objective lens device including an objective lens and a transparent member having two light control portions and optical pickup using the objective lens device | Chong-sam Chung, Pyong-yong Seong | 1999-02-09 |
| 5841754 | Optical pickup device having an objective lens and auxiliary lenses exterior thereof | Jang-hoon Yoo | 1998-11-24 |
| 5822135 | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | Dong-Ho Shin, Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho, Pyong-yong Seong +2 more | 1998-10-13 |
| 5805556 | Optical pickup apparatus having a holographic optical element | Jang-hoon Yoo, Yong-hoon Lee, Kyung-hwa Rim | 1998-09-08 |
| 5802037 | Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses | Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho, Jang-hoon Yoo, Soo Jung | 1998-09-01 |
| 5796700 | Optical pickup to circularize light emitted from a light source | Pyeong-yong Seong, Dong-Ho Shin | 1998-08-18 |
| 5793407 | Method and apparatus for forming a light spot smaller than a theoretical limit for high density recording | Tae Seok Park, Jang-hoon Yoo | 1998-08-11 |
| 5777973 | Reproducing and recording optical pickup compatible with discs having different thicknesses | Jang-hoon Yoo, Chong-sam Chung, Kyung-hwa Rim, Kun-ho Cho | 1998-07-07 |
| 5748172 | Mirror driving method and apparatus of micro-mirror array | Ci-moo Song, Han Ki Cho | 1998-05-05 |
| 5748356 | Optical scanning apparatus | Chang Jin PARK, Dong Hoon Kang | 1998-05-05 |
| 5737299 | Optical pickup apparatus having wave plates | Jang-hoon Yoo | 1998-04-07 |
| 5737295 | Dual-focus optical pickup for different thicknesses of recording medium | — | 1998-04-07 |
| 5734512 | Dual-focus objective lens of optical pickup | Dong-Ho Shin, Kyung-hwa Rim | 1998-03-31 |
| 5721629 | Dual-focus forming method and apparatus thereof | — | 1998-02-24 |
| 5706263 | Method and apparatus for high-density reproduction | Kyung-hwa Rim | 1998-01-06 |
| 5703862 | Dual focus objective lens with two curvatures for focussing light on two different kinds of disks with different thicknesses | Jang-hoon Yoo | 1997-12-30 |