Issued Patents 2004
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816449 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens | Jang-hoon Yoo | 2004-11-09 |
| 6801492 | Solid immersion mirror type objective lens and optical pickup device adopting the same | Ki Won Lee, Seung-tae Jung, Dae-sik Kim | 2004-10-05 |
| 6797739 | Triazene-based compound comprising functionalized alkylthio groups, and photopolymerization initiator | Sung Hyun Kim, Jin-Seuk Kim, Jae Hwan LEE, Dong Chang Choi, Hyuk-Jin Cha | 2004-09-28 |
| 6798732 | Near-field optical storage medium and optical data storage system therefor | Kun-ho Cho, Dong-Ho Shin, Joong-eon Seo, Seung-tae Jung, Byeong-Ho Park +3 more | 2004-09-28 |
| 6791933 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chong-sam Chung, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2004-09-14 |
| 6788636 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens | Jang-hoon Yoo | 2004-09-07 |
| 6765857 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Jang-hoon Yoo, Kun-ho Cho, Pyong-yong Seong | 2004-07-20 |