Issued Patents All Time
Showing 76–98 of 98 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5737481 | Information recording method, information recording apparatus and information recording medium | Toyoji Gushima, Yoshiharu Kobayashi, Ryoji Yamaguchi, Satoshi Kondo, Katsuhiko Yoshida +2 more | 1998-04-07 |
| 5719843 | Method of maximum likelihood decoding and digital information playback apparatus | Takeshi Nakajima, Shigeru Furumiya, Yoshinari Takemura | 1998-02-17 |
| 5671209 | Focusing time period and power control of a multilaser diode array | Yuichi Kamioka, Daisuke Ogata, Shigeru Furumiya | 1997-09-23 |
| 5513197 | Semiconductor laser drive circuit including switched current source | — | 1996-04-30 |
| 5420690 | Optical information recording/reproducing apparatus | — | 1995-05-30 |
| 5400315 | Optical disk system | Yoshinari Takemura, Shigeru Furumiya | 1995-03-21 |
| 5119363 | Optical disk having an index mark | Isao Satoh, Tomio Yoshida, Shunji Ohara | 1992-06-02 |
| 4845720 | Semiconductor laser control circuit | Shinji Kubota, Kenzo Ishibashi | 1989-07-04 |
| 4800548 | Optical recording and reproducing apparatus with abnormality detector | Tamotsu Matsuo | 1989-01-24 |
| 4759006 | Abnormal track skipping detection and control arrangement | Tomio Yoshida, Isao Satoh, Shunji Ohara, Yuzuru Kuroki | 1988-07-19 |
| 4754460 | Drive circuit for semiconductor laser of opto-electric recording/playback apparatus | Mari Kimura, Tamotsu Matsuo | 1988-06-28 |
| 4701609 | Semiconductor laser drive circuit with peak detection and control | Tamotsu Matsuo | 1987-10-20 |
| 4689780 | Optical recording and reproducing head | Shunji Ohara, Tomio Yoshida, Isao Satoh | 1987-08-25 |
| 4688203 | Optical recording and reproducing apparatus | Tamotsu Matsuo, Isao Satoh | 1987-08-18 |
| 4566088 | Optical and reversible recording and reproducing apparatus | Tomio Yoshida, Isao Satoh, Shunji Ohara, Yuzuru Kuroki | 1986-01-21 |
| 4564931 | Optical recording and reproducing head | Shunji Ohara, Tomio Yoshida, Isao Satoh | 1986-01-14 |
| 4546462 | Optical data recording and reproducing apparatus | Tomio Yoshida, Isao Satoh, Shunji Ohara | 1985-10-08 |
| 4545044 | Method and apparatus for optically recording and reproducing information | Isao Satoh, Tomio Yoshida, Shunji Ohara | 1985-10-01 |
| 4535439 | Optical having index mark and sector mark | Isao Satoh, Tomio Yoshida, Shunji Ohara | 1985-08-13 |
| 4523304 | Optical data recording and reproducing apparatus | Isao Satoh, Tomio Yoshida, Shunji Harigae | 1985-06-11 |
| 4509156 | Semiconductor laser driving system | Shunji Ohara, Tomio Yoshida, Isao Satoh | 1985-04-02 |
| 4484319 | Apparatus for locating a track on disc-like optical information carriers | Tomio Yoshida, Isao Satoh, Shunji Harigae | 1984-11-20 |
| 4426693 | Light source intensity control in an optical recording and reproducing apparatus | Isao Satoh, Tomio Yoshida, Shunji Harigae | 1984-01-17 |