Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4742218 | Focus error detection apparatus utilizing focusing an front and rear sides of focal planes | Shigeru Nakamura, Toshimasa Kamisada, Akira Saito, Takeshi Maeda, Toshimitsu Kaku +3 more | 1988-05-03 |
| 4733388 | Information recording disc | Nobuyuki Fujimoto, Shinichi Abe, Kazuo Shigematsu, Yasunori Kanazawa, Toshinori Sugiyama +1 more | 1988-03-22 |
| 4731771 | Tracking servo setting method and apparatus | Takeshi Maeda, Kazuo Shigematsu, Shigeru Nakamura, Masuo Kasai | 1988-03-15 |
| 4725721 | Autofocusing control system | Shigeru Nakamura, Takeshi Maeda | 1988-02-16 |
| 4663751 | Optical information processor for compensating offset | Toshimitsu Kaku, Takeshi Maeda, Shigeru Nakamura | 1987-05-05 |
| 4656618 | Optical information recording and reproducing apparatus | Toshimitsu Kaku, Keiji Kataoka, Kazuo Shigematsu | 1987-04-07 |
| 4622564 | Optical information recording apparatus | Toshimitsu Kaku, Takeshi Nakao | 1986-11-11 |
| 4563760 | Method of detecting light spot control signal | Takeshi Maeda, Kazuo Shigematsu, Masahiro Takasago, Yasumitsu Mizoguchi, Zenji Tsutsumi +1 more | 1986-01-07 |
| 4556965 | Information recording apparatus having automatic focusing | Toshimitsu Miyauchi, Kazuo Shigematsu | 1985-12-03 |
| 4554652 | Optical information processor | Takeshi Maeda, Takakazu Huno, Masahiro Takasago, Yasumitsu Mizoguchi | 1985-11-19 |
| 4550394 | System for optically recording information | Takeshi Maeda, Masahiro Takasago | 1985-10-29 |
| 4532522 | Optical recording apparatus | Takeshi Maeda, Shigeru Nakamura, Toshimitsu Kaku | 1985-07-30 |
| 4525826 | Optical track position detecting apparatus and optical information processor using the same | Shigeru Nakamura, Kazuo Shigematsu, Toshimitsu Kaku, Takeshi Maeda, Tsuyoshi Kato | 1985-06-25 |
| 4523089 | Driving apparatus for semiconductor laser | Takeshi Maeda, Yasumitsu Mizoguchi, Masahiro Takasago, Tokuya Kaneda | 1985-06-11 |
| 4450547 | Focal position detecting optical apparatus | Shigeru Nakamura, Takeshi Maeda, Toshimitsu Kaku, Wasao Takasugi, Tokuya Kaneda | 1984-05-22 |
| 4308612 | Optical information recording apparatus including error checking circuit | Toshimitsu Miyauchi | 1981-12-29 |
| 4301527 | Optical head for a videodisc recorder/player | Toshimitsu Miyauchi, Kazuo Shigematsu, Kimio Tatsuno | 1981-11-17 |
| 4298974 | Optical head for a videodisc player/recorder | Kimio Tatsuno, Toshimitsu Miyauchi, Kunio Aiki, Ryoichi Ito | 1981-11-03 |
| 4293944 | Information play-back apparatus with astigmatic auto-focusing | Morishi Izumita, Takeshi Maeda, Susumu Sawano | 1981-10-06 |
| 4283785 | Optical information recording apparatus | Toshimitsu Miyauchi | 1981-08-11 |