Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826137 | Apparatus and method for authentication/copy protection of optical storage medium and the optical storage medium | Jae Sun Lee, Woon-Sung Yeo | 2004-11-30 |
| 6014492 | Video signal recording and reproducing apparatus for digital video cassette tape recorder | Yung Gil Kim, Joong Kwon Joh, Jae Ryong Kim, Sang Joon Woo, Dong Hwa LEE +9 more | 2000-01-11 |
| 5937135 | Tape-independent video signal recording and reproducing apparatus | Yung Gil Kim, Joong Kwon Joh, Jae Ryong Kim, Sang Joon Woo, Dong Hwa LEE +9 more | 1999-08-10 |
| 5751511 | Capstan phase control method for video cassette tape recorder | Gwi Tae Park, Ji-Yoon Yoo, Sang-Lak Lee | 1998-05-12 |