Issued Patents All Time
Showing 25 most recent of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6055223 | Optical memory apparatus | Kenji Ohta, Yoshikazu Fujii, Tetuya Inui, Shigemi Maeda | 2000-04-25 |
| 5828649 | Magneto-optical memory element | Kenji Ohta, Yoshikazu Fujii, Tetuya Inui, Shigemi Maeda | 1998-10-27 |
| 5809005 | Method for manufacturing a magneto-optical memory element | Kenji Ohta, Yoshikazu Fujii, Tetuya Inui, Shigemi Maeda | 1998-09-15 |
| 5754523 | Optical memory medium with preformed pit arrangement | Kenji Ohta, Akira Takahashi, Kazuo Van, Michinobu Mieda, Tetsuya Inui | 1998-05-19 |
| 5666345 | Optical memory medium with predetermined guide tracks and prepits | Akira Takahashi, Tetsuya Inui, Kenji Ohta, Kazuo Van | 1997-09-09 |
| 5571638 | Lithium secondary battery | Tomoari Satoh, Tatsuo Tateno, Yasuhito Furukawa | 1996-11-05 |
| 5546364 | Magneto-optical memory apparatus utilizing edges or recording mark to manage data | Hiroshi Fuji, Kunio Kojima, Takeshi Yamaguchi, Shigeo Terashima, Akira Takahashi +1 more | 1996-08-13 |
| 5477524 | Optical memory medium with preformed pit arrangement | Kenji Ohta, Akira Takahashi | 1995-12-19 |
| 5470694 | Optical memory element and manufacturing method thereof | Kenji Ohta, Junji Hirokane, Akira Takahashi, Tetsuya Inui, Shohichi Katoh | 1995-11-28 |
| 5432768 | Method and device for data management in optical recording medium | Shigeo Terashima, Kunio Kojima, Shigemi Maeda | 1995-07-11 |
| 5420838 | Disk recording and reproducing device | Shigemi Maeda, Shigeo Terashima, Toshio Ishikawa | 1995-05-30 |
| 5412630 | Tracking system for optical disc memory using tracking error signals from main beam and auxiliary beams | Tetsuya Inui, Kenji Ohta, Shohichi Katoh | 1995-05-02 |
| 5365501 | Information recording and reproducing device | Hiroshi Fuji, Takeshi Yamaguchi | 1994-11-15 |
| 5361247 | Information recording and reproducing device with reproduction and automatic gain control circuit | Hiroshi Fuji, Shigeo Terashima, Takeshi Yamaguchi | 1994-11-01 |
| 5341362 | Optical memory device having guide tracks shaped for increasing the quality of information signals | Yoshikazu Fujii, Tetsuya Inui, Kenji Ohta | 1994-08-23 |
| 5331623 | Optical retrieval system for encoding pit angular data and optical recording element therefor | Hirotsugu Matoba, Shigeo Terashima, Hideyoshi Yamaoka | 1994-07-19 |
| 5301174 | Optical disk recording and reproducing apparatus | Hirotsugu Matoba, Masaru Nomura, Shigeo Terashima | 1994-04-05 |
| 5278814 | Apparatus for recording and reproducing information on and from an optical disk | Hiroshi Fuji, Shigeo Terashima | 1994-01-11 |
| 5274617 | Method and device for data management in an optical recording medium | Shigeo Terashima, Kunio Kojima, Shigema Maeda | 1993-12-28 |
| 5200941 | Optical retrieval system for encoding pit angular data and optical recording element thereof | Hirotsugu Matoba, Shigeo Terashima, Hideyoshi Yamaoka | 1993-04-06 |
| 5196978 | Cartridge case | Junichi Washo, Kenji Ohta, Shigeo Terashima, Masahiro Horii, Takao Hyuga | 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, Shigeo Terashima | 1993-01-26 |
| 5170389 | Semiconductor laser driving circuit with control circuit power voltage monitor for preventing inadvertent recording | Tomiyuki Numata, Kunio Kojima, Shigeo Terashima | 1992-12-08 |
| 5166838 | Digital signal reproduction apparatus for reading magneto-optical discs | Hiroshi Fuji, Takeshi Yamaguchi, Kunio Kojima, Shigeo Terashima, Tsuneo Fujiwara | 1992-11-24 |
| 5142521 | Recording/reproducing device | Shigeo Terashima, Kunio Kojima, Shigemi Maeda | 1992-08-25 |