Issued Patents All Time
Showing 26–50 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5196978 | Cartridge case | Junichi Washo, Kenji Ohta, Masahiro Horii, Takao Hyuga, Toshihisa Deguchi | 1993-03-23 |
| 5182741 | Optical disk recording/reproducing device utilizing a constant angular velocity method with a constant linear velocity formatted optical disk | Shigemi Maeda, Toshihisa Deguchi | 1993-01-26 |
| 5170389 | Semiconductor laser driving circuit with control circuit power voltage monitor for preventing inadvertent recording | Tomiyuki Numata, Kunio Kojima, Toshihisa Deguchi | 1992-12-08 |
| 5166838 | Digital signal reproduction apparatus for reading magneto-optical discs | Hiroshi Fuji, Takeshi Yamaguchi, Kunio Kojima, Toshihisa Deguchi, Tsuneo Fujiwara | 1992-11-24 |
| 5153861 | Recording/reproducing device | Shigemi Maeda | 1992-10-06 |
| 5142521 | Recording/reproducing device | Toshihisa Deguchi, Kunio Kojima, Shigemi Maeda | 1992-08-25 |
| 5136574 | Optical card and a recording/reproduction apparatus for the same | Hirotsugu Matoba | 1992-08-04 |
| 5134607 | Optical memory system for generating a timing control signal for detecting a recorded region through a playback signal | Hiroshi Fuji, Shigemi Maeda, Noriaki Sakamoto, Takeshi Yamaguchi, Kentaro Tsuji +1 more | 1992-07-28 |
| 5111031 | Optical card and a recording/reproduction apparatus for the same | Hirotsugu Matoba | 1992-05-05 |
| 5093820 | Optical disk recording/reproducing device | Shigemi Maeda, Hiroshi Fuji, Toshihisa Deguchi | 1992-03-03 |
| 5056076 | Method for controlling the rotational velocity of an information recording disk | Kentaroh Tsuji, Hiroshi Fuji, Tomiyuki Numata, Tsuneo Fujiwara | 1991-10-08 |
| 5048004 | Optical recording medium recording and reproducing device | Toshihisa Deguchi, Takeshi Yamaguchi, Shigemi Maeda, Takashi Iwaki, Tsuneo Fujiwara | 1991-09-10 |
| 5018120 | Optical recording medium track indexing system | Kentaroh Tsuji, Tsuneo Fujiwara, Hiroshi Fuji, Tomiyuki Numata | 1991-05-21 |
| 5010540 | Apparatus for recording and reproducing information on and from an optical disk | Hiroshi Fuji, Tsuneo Fujiwara, Takashi Iwaki, Tomiyuki Numata, Kentaroh Tsuji +4 more | 1991-04-23 |
| 5010539 | Optical disk device for storing both analog and discrete data and which utilizes both CLV and CAV techniques | Kentaro Tsuji, Hiroshi Fuji | 1991-04-23 |
| 5001732 | Track counter for optical disk | Masaru Nomura, Hirotsugu Matoba, Toshihisa Deguchi | 1991-03-19 |
| 4999824 | Magneto-optical memory device | Hiroshi Fuji, Shigemi Maeda, Noriaki Sakamoto, Takeshi Yamaguchi, Kentaro Tsuji +1 more | 1991-03-12 |
| 4954903 | Digital signal reproduction apparatus for reading magneto-optical disks | Hiroshi Fuji, Takeshi Yamaguchi, Kunio Kojima, Toshihisa Deguchi, Tsuneo Fujiwara | 1990-09-04 |
| 4924447 | Optical memory device for recording, reproducing or erasing information onto a recording medium, including a recorded region detecting circuit. | Hiroshi Fuji, Shigemi Maeda, Noriaki Sakamoto, Takeshi Yamaguchi, Kentaro Tsuji +1 more | 1990-05-08 |
| 4920437 | Disc clamping device | Junichi Washo, Toshihisa Deguchi, Masahiro Horii, Takao Hyuga, Kenji Ohta | 1990-04-24 |
| 4910479 | Automatic gain control device for use in an optical memory device | Hiroshi Fuji, Shigemi Maeda, Takeshi Yamaguchi, Kunio Kojima, Toshihisa Deguchi | 1990-03-20 |
| 4906874 | Analog signal switching device for use in an optical memory | Hiroshi Fuji, Shigemi Maeda, Takeshi Yamaguchi, Kunio Kojima, Toshihisa Deguchi | 1990-03-06 |
| 4862443 | Sync signal detection apparatus for accurately synchronizing reproduced data | Kentaroh Tsuji, Shigemi Maeda, Takeshi Yamaguchi, Toshihisa Deguchi, Noriaki Sakamoto | 1989-08-29 |
| 4849953 | Tracking circuit for an optical information recording and reproducing apparatus | Masaru Nomura, Toshihisa Deguchi | 1989-07-18 |
| 4766584 | Three-dimensional driving arrangement | Yoshihiro Sekimoto, Kunio Kojima | 1988-08-23 |