Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6594204 | Lens holder, method for manufacturing lens holder, metal die for producing lens holder and objective lens device | Kenji Yamamoto, Fumisada Maeda | 2003-07-15 |
| 6570827 | OPTICAL ELEMENT FOR CORRECTION OF CHROMATIC ABERRATION, OPTICAL PICK-UP DEVICE HAVING OPTICAL ELEMENT FOR CORRECTION OF CHROMATIC ABERRATION, OPTICAL REPRODUCING DEVICE HAVING OPTICAL PICK-UP DEVICE AND OPTICAL RECORDING AND REPRODUCING DEVICE | Kenji Yamamoto, Isao Ichimura, Fumisada Maeda, Toshio Watanabe, Akira Suzuki | 2003-05-27 |
| 6560391 | Optical switch and optical disk drive | Masahiro Yamada | 2003-05-06 |
| 6552968 | Optical recording medium, method of producing same, and optical recording and reproduction device | Koichiro Kishima, Yuji Kuroda, Isao Ichimura, Kimihiro Saito | 2003-04-22 |