Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834036 | Optical head for a plurality of types of information recording media | Keiichi Matsuzaki, Tetsuo Saimi | 2004-12-21 |
| 6806964 | Optical recording and/or reproduction apparatus, tracking method, and optical recording medium | Hiroaki Yamamoto, Tetsuo Saimi | 2004-10-19 |
| 6738324 | Recording and/or reproduction apparatus | Tatsuo Saimi, Hiroaki Yamamoto | 2004-05-18 |
| 6728034 | Diffractive optical element that polarizes light and an optical pickup using the same | Hideyuki Nakanishi, Shoichi Takasuka, Shinichi Ijima, Akio Yoshikawa | 2004-04-27 |