Issued Patents All Time
Showing 26–50 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6987725 | Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same | Kiyoshi Osato, Jun Nakano, Shin Masuhara | 2006-01-17 |
| 6987723 | Optical recording medium with high density track pitch and optical disk drive for recording and playback of the same | Kiyoshi Osato, Jun Nakano, Shin Masuhara | 2006-01-17 |
| 6967050 | Optical recording medium and a method of manufacturing the same | Koichiro Kishima, Kimihiro Saito, Kiyoshi Osato | 2005-11-22 |
| 6934224 | Optical recording medium/system with heat-dissipating and light reflecting layers | Yuji Kuroda, Koichiro Kishima, Kiyoshi Osato | 2005-08-23 |
| 6882616 | Optical recording medium with high density track pitch and optical disk device for recording and playback of the same | Kiyoshi Osato, Jun Nakano, Shin Masuhara | 2005-04-19 |
| 6826133 | Optimizing a distance between lenses of a two objective lens for minimizing wavefront aberration and offsetting focus control | Tatsuya Narahara, Kiyoshi Osato | 2004-11-30 |
| 6683845 | Optical recording medium, method of producing same, and optical recording and reproduction device | Koichiro Kishima, Yuji Kuroda, Kiyoshi Osato, Kimihiro Saito | 2004-01-27 |
| 6683846 | Information recording disc having an anti-reflection layer and information recording/reproducing apparatus | Koichiro Kishima, Yuji Kuroda, Kiyoshi Osato | 2004-01-27 |
| 6674696 | Focus controlling apparatus and method, and optical disc drive | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe | 2004-01-06 |
| 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 |
| 6414931 | Lens driving device, optical head and optical disc system | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe | 2002-07-02 |
| 6404710 | Position controller and position control method of optical system and recording/reproducing apparatus and driving method thereof | Koichiro Kishima | 2002-06-11 |
| 6324133 | Optical recording and reproducing apparatus and optical recording and reproducing method | — | 2001-11-27 |
| 6307689 | Optical head and drive device for optical recording medium | Koichiro Kishima, Kenji Yamamoto, Kiyoshi Osato | 2001-10-23 |
| 6292453 | Optical disc recording/reproduction apparatus having a lens group, focus, servo, and jog mode adjustment | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe, Akira Suzuki | 2001-09-18 |
| 6222814 | Recording/reproducing apparatus and method for phase-change optical disc | — | 2001-04-24 |
| 6115347 | Optical pick-up device, optical recording/reproducing apparatus and objective lens | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe, Atsushi Fukumoto +1 more | 2000-09-05 |
| 6104691 | Objective lens unit and recording/reproduction apparatus | Kenji Yamamoto, Fumisada Maeda, Toshio Watanabe, Kiyoshi Ohsato | 2000-08-15 |
| 6097688 | Recording/reproducing apparatus and recording/reproducing method for optical recording media | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe, Atsushi Fukumoto +1 more | 2000-08-01 |
| 6058095 | Objective lens having a doublet lens with high numerical aperture | Kenji Yamamoto, Fumisada Maeda, Toshio Watanabe, Kiyoshi Ohsato | 2000-05-02 |
| 6055113 | Optical pickup and an optical pickup objective lense assembling method | Kenji Yamamoto, Fumisada Maeda, Toshio Watanabe, Akira Suzuki, Kiyoshi Ohsato | 2000-04-25 |
| 6041031 | Optical disc recording/reproduction apparatus and method | Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe, Akira Suzuki | 2000-03-21 |