Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7095686 | Defocus error signal detection apparatus having phase comparators and a matrix circuit for an optical recording/reproduction system | Byung-in Ma, In-sik Park, Chong-sam Chung, Tae-yong Doh, Byoung-ho Choi | 2006-08-22 |
| 6977876 | Apparatus for and method of detecting defocus error signal for optical pickup and apparatus for and method of detecting seek direction | Byung-in Ma, In-sik Park, Chong-sam Chung, Tae-yong Doh, Byoung-ho Choi | 2005-12-20 |
| 6967918 | Optical recording medium with wobbled header area, and data recording method and apparatus therefor | Kyung-geun Lee, In-sik Park, Jung-wan Ko, Tae Kyung Kim, Tatsuhiro Otsuka +1 more | 2005-11-22 |
| 6819645 | Recording medium with wobble-modulated track, and method of and apparatus for detecting header region of the same | Jung-wan Ko, Tatsuhiro Otsuka | 2004-11-16 |
| 6813227 | Apparatus and method to compensate for disturbance using learning control in an optical recording/reproducing apparatus and optical recording medium drive servo system | Seong-il Cho, Joong-eon Seo, Soo-yul Jung | 2004-11-02 |
| 6801486 | Method and apparatus to generate a monitoring signal for an optical recording/reproducing system | Byung-in Ma, In-sik Park, Tae-yong Doh, Byoung-ho Choi | 2004-10-05 |
| 6754146 | Error signal detection apparatus for an optical recording/reproduction system | Byung-in Ma, In-sik Park, Chong-sam Chung, Tae-yong Doh, Byoung-ho Choi | 2004-06-22 |
| 6687201 | Apparatus for generating seek direction detection signal | Byung-in Ma, Chong-sam Chung, In-sik Park, Byoung-ho Choi, Tae-yong Doh | 2004-02-03 |