Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6600714 | Optical recording medium, optical pickup and optical recording and/or reproducing apparatus | Koichiro Kishima, Kenji Yamamoto, Yuji Kuroda | 2003-07-29 |
| 6590914 | Semiconductor laser drive circuit | Hironobu Tanase | 2003-07-08 |
| 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, Fumisada Maeda, Toshio Watanabe, Akira Suzuki, Kiyoshi Osato | 2003-05-27 |
| 6552968 | Optical recording medium, method of producing same, and optical recording and reproduction device | Koichiro Kishima, Yuji Kuroda, Kiyoshi Osato, Kimihiro Saito | 2003-04-22 |