Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6888861 | Semiconductor laser apparatus, information recording/reproduction apparatus and image recording apparatus | Tetsuya Nagahama, Masayuki Tazawa | 2005-05-03 |
| 6855919 | High-frequency current generating circuit and control device for controlling light intensity of laser diode | — | 2005-02-15 |
| 6529536 | Laser drive circuit and recording apparatus using the same | — | 2003-03-04 |
| 6501775 | Semiconductor laser driving circuit and semiconductor laser device | Makoto Morimoto | 2002-12-31 |
| 6489600 | High-frequency current generating circuit and control device for controlling light intensity of laser diode | — | 2002-12-03 |
| 6345062 | Semiconductor laser control circuit, semiconductor laser apparatus, information recording/reproduction apparatus and image recording apparatus | Tetsuya Nagahama, Masayuki Tazawa | 2002-02-05 |
| RE37524 | Device for driving a semiconductor laser by a plurality of driving elements | — | 2002-01-22 |
| 6320890 | Laser driving circuit capable of stably controlling laser output | — | 2001-11-20 |
| 6177814 | Semiconductor integrated circuit device | — | 2001-01-23 |
| 6111901 | Semiconductor laser driving circuit, semiconductor laser device, image recording apparatus, and optical disk apparatus | Masayuki Tazawa | 2000-08-29 |
| 6011768 | Laser light control circuit, optical pickup unit and optical pickup device incorporating the same | — | 2000-01-04 |
| 5848044 | Semiconductor laser driving circuit, semiconductor laser device, image recording apparatus, and optical disk apparatus | Masayuki Tazawa | 1998-12-08 |
| 5776574 | Optical recording medium and optical recording/reproducing apparatus | Yoshinori Honguh, Hiroshi Hasegawa, Tadashi Kobayashi, Naoki Morishita, Naomasa Nakamura | 1998-07-07 |
| 5740138 | Apparatus for recording information on a primary optical disk to manufacture optical disks | Isao Hoshino, Masaaki Matsumaru, Masahiko Tanaka | 1998-04-14 |
| RE35766 | Stabilized-feedback control device for semiconductor lasers | — | 1998-04-07 |
| 5694409 | Device for driving a semiconductor laser by a plurality of driving elements | — | 1997-12-02 |
| 5579329 | Semiconductor laser apparatus, information recording/reproducing apparatus and image recording apparatus | — | 1996-11-26 |
| 5475210 | Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device | Toshihiro Sugaya, Hisashi Yamada, Kei Shimura, Isao Hoshino, Masahiko Tanaka +4 more | 1995-12-12 |
| 5474826 | Optical recording medium and optical recording/reproducing apparatus | Yoshinori Honguh, Hiroshi Hasegawa, Tadashi Kobayashi, Naoki Morishita, Naomasa Nakamura | 1995-12-12 |
| 5431975 | Optical recording medium and optical recording/reproducing apparatus | Yoshinori Honguh, Hiroshi Hasegawa, Tadashi Kobayashi, Naoki Morishita, Naomasa Nakamura | 1995-07-11 |
| 5250796 | Noise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser device | Toshihiro Sugaya, Hisashi Yamada, Kei Shimura | 1993-10-05 |
| 5172357 | Phase-synchronous controller for production of reference clock signal in optical disk drive system | — | 1992-12-15 |
| 5097473 | Stabilized-feedback control device for semiconductor lasers | — | 1992-03-17 |