Issued Patents All Time
Showing 26–50 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592452 | Optical disk with logical tracks formed thereon and optical disk drive device | M. C. Rao, Hiroyuki Ohata, Kazuhiko Nakane, Teruo Furukawa, Jinichi Kondo +1 more | 1997-01-07 |
| 5481517 | Track jump control means for a disk apparatus | Yoshiki Nakajima, Kimiyuki Koyanagi, Osamu Ito, Akira Mashimo, Hiroyuki Onda +2 more | 1996-01-02 |
| 5457674 | Optical disc recording apparatus | Isao Watanabe, Koichi Yamada, Kunimaro Tanaka | 1995-10-10 |
| 5438557 | Optical disk storage which provides pull-in of focus servo and pull-in of tracking servo | Osamu Ito, Yoshihiro Kiyose, Kazuhiko Nakane, Akira Mashimo, Hiroyuki Onda +2 more | 1995-08-01 |
| 5369628 | Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method | Osamu Ito, Kunimaro Tanaka, Koichi Takeuchi, Isao Watanabe, Kazuhiko Tsutsumi | 1994-11-29 |
| RE34769 | Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit | Kyouji Shimoda | 1994-11-01 |
| 5321675 | Pit spacing in the servo field of an optical disk for speed and direction detection and data retrieval | Osamu Ito, Masaharu Ogawa, Kunimaro Tanaka, Teruo Furukawa, Masafumi Ototake | 1994-06-14 |
| 5319626 | Method for rewriting defect management areas on optical disk according to ECMA standard | Minoru Ozaki, Hiroyuki Onda, Koji Yamana, Takuya Nagata, Hidehiko Murata +1 more | 1994-06-07 |
| 5317143 | Optical data medium driving apparatus and a servo circuit with normalization processing | Kyouji Shimoda | 1994-05-31 |
| 5309415 | Information recording method for overwriting a magneto-optic recording medium with two intensities of light beams | Koichi Takeuchi, Osamu Ito, Kunimaro Tanaka, Isao Watanabe, Kazuhiko Tsutsumi +6 more | 1994-05-03 |
| 5272684 | Information recording method and information recording apparatus for magneto-optic recording information medium | Koichi Takeuchi, Osamu Ito, Kunimaro Tanaka, Isao Watanabe, Kazuhiko Tsutsumi +6 more | 1993-12-21 |
| 5265077 | Optical disk storage having reduced power consumption during seeking operations | Teruo Furukawa, Minoru Ozaki, Akira Mashimo, Hiroyuki Onda | 1993-11-23 |
| 5251194 | Techniques for controlling beam position and focus in optical disk drives | Osamu Ito, Kimiyuki Koyanagi, Yoshiki Nakajima, Shuitsu Takeda, Kyoji Shimoda | 1993-10-05 |
| 5247509 | Disk storage which automatically adjusts to optimum recording/reproducing level | Kazuhiko Nakane, Yoshihiro Kiyose, Teruo Furukawa, Akira Mashimo, Hiroyuki Onda +2 more | 1993-09-21 |
| 5197048 | Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method | Osamu Ito, Kunimaro Tanaka, Koichi Takeuchi, Isao Watanabe, Kazuhiko Tsutsumi | 1993-03-23 |
| 5184338 | Optical disc system with improved track jumping operation | Kyouzi Shimoda | 1993-02-02 |
| 5172364 | Magneto-optic recording apparatus with controlled magnetic field generation | Osamu Ito, Kunimaro Tanaka, Koichi Takeuchi, Isao Watanabe, Kazuhiko Tsutsumi | 1992-12-15 |
| 5128916 | Optical disc with alternating servo patterns and driving apparatus therefor | Osamu Ito, Masaharu Ogawa, Kunimaro Tanaka, Teruo Furukawa, Yoshiki Nakajima | 1992-07-07 |
| 5117412 | Optical disc with servo pattern providing enhanced reliability of servo clock detection and apparatus for accessing the optical disc | Osamu Ito, Masaharu Ogawa, Kunimaro Tanaka, Teruo Furukawa, Yoshiki Nakajima | 1992-05-26 |
| 5107483 | Frequency selective optical data record/regenerate apparatus | Yoshiki Nakajima, Kunimaro Tanaka, Motomu Yoshimura, Mitsuo Maeda, Koichi Takeuchi +7 more | 1992-04-21 |
| 5070492 | Signal decoding apparatus and method | Masaharu Ogawa, Yoshiki Nakajima, Osamu Ito, Teruo Furukawa, Kunimaro Tanaka +2 more | 1991-12-03 |
| 5063546 | Optic disc with servo pattern and apparatus for accessing the optical disc | Osamu Ito, Masaharu Ogawa, Kunimaro Tanaka, Teruo Furukawa, Yoshiki Nakajima | 1991-11-05 |
| 5007038 | Method and apparatus for producing an accurate error signal in an optical recording medium driver | Kazuhiko Nakane, Teruo Furukawa, Masayoshi Shimamoto | 1991-04-09 |
| 5004901 | Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit | Kyouji Shimoda | 1991-04-02 |
| 4812726 | Servo circuit positioning actuator | Toshihiko Benii | 1989-03-14 |