Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5553044 | Optical recording method and apparatus for enabling interchange of dissimilar recording media | — | 1996-09-03 |
| 5528565 | Magneto-optic recording system | Isao Watanabe, Koichi Takeuchi, Osamu Ito, Kyosuke Yosimoto, Kazuhiko Tsutsumi | 1996-06-18 |
| 5481508 | Magneto-optic recording medium method of manufacturing the same and magneto-optic recording system | Isao Watanabe, Koichi Takeuchi, Osamu Ito, Kyosuke Yosimoto, Kazuhiko Tsutsumi | 1996-01-02 |
| 5457674 | Optical disc recording apparatus | Isao Watanabe, Koichi Yamada, Kyosuke Yoshimoto | 1995-10-10 |
| 5369628 | Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method | Kyosuke Yoshimoto, Osamu Ito, Koichi Takeuchi, Isao Watanabe, Kazuhiko Tsutsumi | 1994-11-29 |
| 5321675 | Pit spacing in the servo field of an optical disk for speed and direction detection and data retrieval | Osamu Ito, Masaharu Ogawa, Kyosuke Yoshimoto, Teruo Furukawa, Masafumi Ototake | 1994-06-14 |
| 5309415 | Information recording method for overwriting a magneto-optic recording medium with two intensities of light beams | Koichi Takeuchi, Osamu Ito, Kyosuke Yoshimoto, 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, Kyosuke Yoshimoto, Isao Watanabe, Kazuhiko Tsutsumi +6 more | 1993-12-21 |
| 5218591 | Optical disk apparatus for shaping pits recorded on an optical disk | Masayoshi Shimamoto, Isao Watanabe, Osamu Ito | 1993-06-08 |
| 5197048 | Magneto-optic recording medium, magneto-optic recording system and magneto-optic recording method | Kyosuke Yoshimoto, Osamu Ito, Koichi Takeuchi, Isao Watanabe, Kazuhiko Tsutsumi | 1993-03-23 |
| 5185746 | Optical recording system with error correction and data recording distributed across multiple disk drives | Minoru Ozaki, Yoshihiro Kiyose, Osamu Ito | 1993-02-09 |
| 5172364 | Magneto-optic recording apparatus with controlled magnetic field generation | Kyosuke Yoshimoto, Osamu Ito, Koichi Takeuchi, Isao Watanabe, Kazuhiko Tsutsumi | 1992-12-15 |
| 5153879 | Optical recording system | Minoru Ozaki, Yoshihiro Kiyose, Osamu Ito | 1992-10-06 |
| 5128916 | Optical disc with alternating servo patterns and driving apparatus therefor | Osamu Ito, Masaharu Ogawa, Kyosuke Yoshimoto, 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, Kyosuke Yoshimoto, Teruo Furukawa, Yoshiki Nakajima | 1992-05-26 |
| 5115424 | Optical storage medium with provision for limitation of thermal conduction | Hajime Nakajima, Isao Watanabe | 1992-05-19 |
| 5107483 | Frequency selective optical data record/regenerate apparatus | Yoshiki Nakajima, Kyosuke Yoshimoto, 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, Kyosuke Yoshimoto +2 more | 1991-12-03 |
| 5063546 | Optic disc with servo pattern and apparatus for accessing the optical disc | Osamu Ito, Masaharu Ogawa, Kyosuke Yoshimoto, Teruo Furukawa, Yoshiki Nakajima | 1991-11-05 |
| 4835752 | Device for driving and controlling optical head for use in optical disk system | Keiji Nakatsu, Shigeo Hayashi, Masaharu Ogawa, Osamu Itou, Isao Watanabe | 1989-05-30 |
| 4703494 | PCM signal transmission system | Minoru Ozaki | 1987-10-27 |
| 4701812 | PCM recording and reproducing apparatus | Minoru Ozaki | 1987-10-20 |
| 4485417 | PCM Recording and reproducing device | Minoru Ozaki | 1984-11-27 |
| 4423441 | PCM Record reproducer | Minoru Ozaki, Ken Onishi | 1983-12-27 |
| 4356517 | PCM Audio reproducing system | Minoru Ozaki, Ken Onishi | 1982-10-26 |