Issued Patents All Time
Showing 201–222 of 222 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699340 | Method for correcting aberration due to optical disk tilt and apparatus therefor | Kyung-hwa Rhim, Pyong-yong Seong, Chong-sam Chung | 1997-12-16 |
| 5699339 | Inverse image generating method apparatus thereof and focus error detecting method using the same and apparatus thereof | Chong-sam Chung, Jang-hoon Yoo, Kyung-hwa Rim | 1997-12-16 |
| 5665957 | Lens device comprising light blocking means and an optical pickup apparatus using the lens device | Dong-Ho Shin, Kyung-hwa Rim, Chong-sam Chung, Kun-ho Cho, Pyong-yong Seong +2 more | 1997-09-09 |
| 5657146 | Optical scanning apparatus | Min Ho Choi, Young Gi Kim | 1997-08-12 |
| 5650986 | Optical pickup driving apparatus for an optical disk drive | Young Woong Kim | 1997-07-22 |
| 5640265 | Optical scanning apparatus | Chang Jin PARK, Dong Hoon Kang | 1997-06-17 |
| 5631893 | Multi-head device for optical disk and recording/reproducing system for multiple users utilizing the same | Jin Ku Kang, Sung-han Ha, Tae Seok Park | 1997-05-20 |
| 5629514 | Critical angle focus error detector | Chong-sam Chung, Jang-hoon Yoo, Kyung-hwa Rim | 1997-05-13 |
| 5617398 | In-line optical pickup using Wollaston Prism and collimating lens directing polarized light components to detectors | Jong-sam Jeong, Eung-Ho Kim | 1997-04-01 |
| 5594714 | Focus error detection with two symmetrically splitted reflected beams | Kyung-hwa Rim, Pyong-yong Seong, Chong-sam Chung | 1997-01-14 |
| 5587976 | Optical pickup for optical magnetic disc | Jang-hoon Yoo, Kyung-hwa Rim, Chong-sam Chung | 1996-12-24 |
| 5566016 | Laser beam scanner | — | 1996-10-15 |
| 5557597 | Focus error detector | Jang-hoon Yoo | 1996-09-17 |
| 5537384 | Focus error detector | Chong-sam Chung, Jan-hoon Yoo, Kyung-hwa Rim | 1996-07-16 |
| 5526336 | Optical pickup for optical disk having multiple recording layers | Tai-suk Park, Kyung-hwa Rim | 1996-06-11 |
| 5400314 | Optical pickup using a lamp | — | 1995-03-21 |
| 5383173 | Optical pick-up utilizing a phase diffraction grating for diffracting reflected light in two directions | Young Woong Kim | 1995-01-17 |
| 5374819 | Optical head having a beam cutting mirror with a total absorption surface | Young Woong Kim | 1994-12-20 |
| 5363353 | Magneto-optical disk drive having multiple electromagnet elements | Young Woong Kim, Ick-hyoung Yoo | 1994-11-08 |
| 5295129 | Light signal detecting circuit | — | 1994-03-15 |
| 5206852 | High-density recording optical head | Yeong Woong Kim, Ick-hyoung Yoo, Byeong-Ho Park, Chang Geun Kim | 1993-04-27 |
| 5091571 | Process for preparing N,N'-disubstituted urea | Jae Sung Lee, Sang Moo Lee | 1992-02-25 |