Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6480454 | Optical element, optical head using the optical element, and optical recording and reproducing apparatus using the optical element | Daisuke Ogata, Sadao Mizuno, Seiji Nishino, Tetsuo Saimi | 2002-11-12 |