Issued Patents All Time
Showing 76–100 of 112 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6115347 | Optical pick-up device, optical recording/reproducing apparatus and objective lens | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe +1 more | 2000-09-05 |
| 6101163 | Optical disc apparatus with reduced leakage of wobble signal to reproduction signal | Masayoshi Kanno | 2000-08-08 |
| 6097688 | Recording/reproducing apparatus and recording/reproducing method for optical recording media | Isao Ichimura, Fumisada Maeda, Kenji Yamamoto, Kiyoshi Ohsato, Toshio Watanabe +1 more | 2000-08-01 |
| 6005834 | Optical recording medium recording and reproducing apparatus and optical pickup device | Fumisada Maeda, Toshio Watanabe, Isao Ichimura, Kenji Yamamoto, Kiyoshi Ohsato | 1999-12-21 |
| 6002653 | Magneto-optical head unit capable of compensating the Kerr ellipticity | — | 1999-12-14 |
| 5987002 | Magneto-optical recording medium and method and apparatus for reproducing data therefrom | Katsuhisa Aratani, Shin Masuhara | 1999-11-16 |
| 5923632 | Optical pick-up device for a multi-layer recording medium with a photodetector arrangement for focusing and tracking control | Yoshiaki Kato | 1999-07-13 |
| 5898606 | Electrically programmable and erasable nonvolatile semiconductor memory device and operating method therefor | Shinichi Kobayashi, Yasushi Terada, Yoshikazu Miyawaki, Takeshi Nakayama, Tomoshi Futatsuya +4 more | 1999-04-27 |
| 5892944 | Program execution and operation right management system suitable for single virtual memory scheme | Toshinari Takahashi, Toshio Okamoto, Hideki Yoshida, Sung-Ho Shin | 1999-04-06 |
| 5852591 | Magneto-optical recording medium and head unit for a magneto-optical recording medium | — | 1998-12-22 |
| 5768221 | Method of and apparatus for initializing multi-layer optical recording medium | Yutaka Kasami, Koichi Yasuda, Shigeki Takagawa | 1998-06-16 |
| 5764606 | Tracking control apparatus for a multi-layer optical disc and method therefor | Motoi Kimura, Yoshiaki Kato | 1998-06-09 |
| 5745417 | Electrically programmable and erasable nonvolatile semiconductor memory device and operating method therefor | Shinichi Kobayashi, Yasushi Terada, Yoshikazu Miyawaki, Takeshi Nakayama, Tomoshi Futatsuya +4 more | 1998-04-28 |
| 5694379 | Magneto-optical recording medium and recording apparatus therefor | Katsuhisa Aratani, Tatsuya Narahara, Shin Masuhara | 1997-12-02 |
| 5625633 | Laser light generating apparatus | Isao Ichimura | 1997-04-29 |
| 5579294 | Magneto-optical medium and recording and/or reproducing apparatus thereof | Masumi Ohta, Isamu Nakao, Toshiki Udagawa, Shunji Yoshimura | 1996-11-26 |
| 5538912 | Method of making memory cells with peripheral transistors | Yuichi Kunori, Natsuo Ajika, Hiroshi Onoda, Makoto Ohi | 1996-07-23 |
| 5473154 | Optical pickup apparatus employing nonpolarization beam splitter and quarter wavelength plate | Naoya Eguchi | 1995-12-05 |
| 5450387 | Optical pickup apparatus for phase changing optical disk | Masumi Ono, Kouichi Yasuda | 1995-09-12 |
| 5432774 | Optical recording medium | Toshiki Udagawa, Shunji Yoshimura, Masumi Ono, Kouichi Yasuda | 1995-07-11 |
| 5400278 | Semiconductor memory device and method of manufacturing the same | Yuichi Kunori, Natsuo Ajika, Hiroshi Onoda, Makoto Ohi | 1995-03-21 |
| 5394381 | Optical pickup apparatus and magneto-optical reproducing system | Michio Oka | 1995-02-28 |
| 5390162 | Method for reproducing signals recorded on optical recording medium | Toshiki Udagawa, Shunji Yoshimura, Masumi Ono, Kouichi Yasuda | 1995-02-14 |
| 5380573 | Optical recording medium | Toshiki Udagawa, Shunji Yoshimura, Masumi Ohta, Masumi Ono, Kouichi Yasuda | 1995-01-10 |
| 5371722 | Method for recording sector control information on magneto-optical disk | Shunji Yoshimura, Toshiki Udagawa | 1994-12-06 |