Issued Patents All Time
Showing 76–96 of 96 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703846 | Optical disk tracking control method, optical disk device, and optical disk with increased recording density | Atsushi Saito | 1997-12-30 |
| 5703855 | Optical disk apparatus and recording and reading method for an optical disk using the same | Fumiyoshi Kirino, Tsuyoshi Toda, Horishi Ide, Atsushi Saito, Hiroyuki Tsuchinaga +6 more | 1997-12-30 |
| 5648949 | Method and apparatus for information reproduction at variable reference level | Harukazu Miyamoto, Kiyoshi Matsumoto | 1997-07-15 |
| 5614938 | Three-dimensional recording and reproducing apparatus | Takeshi Maeda, Kiyoshi Matsumoto, Motoyasu Terao, Shigenori Okamine, Tetsuya Nishida +1 more | 1997-03-25 |
| RE35435 | Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type | Atsushi Saito, Takeshi Maeda, Wasao Takasugi | 1997-01-28 |
| 5572503 | Correcting non-linear distortions of optical information with a non-linear equalizer | Naoki Satoh, Takeshi Maeda, Atsushi Saito, Hirofumi Sukeda, Hiroyuki Tsuchinaga +1 more | 1996-11-05 |
| 5559777 | Optical recording method employing pit edge recording on recording medium divided into a plurality of zones wherein recording parameters vary from zone to zone | Takeshi Maeda, Shinichi Arai, Kazuo Isaka, Atsushi Saito, Takuya Mizokami +1 more | 1996-09-24 |
| 5553051 | Increased intensity optical recording medium with adjacent grooves of different optical depth and a method and apparatus for reproducing the same | Takeshi Maeda, Hiroshi Ide, Kazuo Shigematsu, Masaru Ito | 1996-09-03 |
| 5491683 | Optical information recording/reproducing method | Takeshi Maeda, Hirofumi Sukeda, Kouichirou Wakabayashi | 1996-02-13 |
| 5420846 | Recording medium having a plurality of nonlinear transmission characteristics | Akira Arimoto, Motoyasu Terao, Norio Murase, Kimio Tatsuno, Masahiko Takahashi +2 more | 1995-05-30 |
| 5414451 | Three-dimensional recording and reproducing apparatus | Takeshi Maeda, Kiyoshi Matsumoto, Motoyasu Terao, Shigenori Okamine, Tetsuya Nishida +1 more | 1995-05-09 |
| 5346522 | Method and apparatus for molding optical glass elements or the like | Yoshizo Komiyama, Fumio Arai, Yutaka Hasegawa, Tetsuya Tanioka, Yoshiyasu Toyama +1 more | 1994-09-13 |
| 5315573 | Non-linear optical saturable absorber layer in an optical disk to discriminate wavelength above or below a threshold level of intensity | Takeshi Nakao, Akira Arimoto, Kensuke Ogawa, Hirofumi Sukeda | 1994-05-24 |
| 5281797 | Short wavelength optical disk head having a changeable aperture | Kimio Tatsuno, Shigeru Nakamura, Masahiko Takahashi | 1994-01-25 |
| 5105409 | Method and apparatus for optical recording and reproduction with tracking servo reducing track offset | Toshimitsu Kaku, Kazuo Shigematsu, Takeshi Maeda, Masahiro Takasago | 1992-04-14 |
| 4980877 | Optical recording and reproducing system with high track density and low cross-talk | Takeshi Maeda, Atsushi Saito | 1990-12-25 |
| 4969137 | Optical recording and reproducing apparatus having a multi-spot positioning control mechanism | Takeshi Maeda, Atsushi Saito, Fumio Hara | 1990-11-06 |
| 4866692 | Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type | Atsushi Saito, Takeshi Maeda, Wasao Takasugi | 1989-09-12 |
| 4835759 | Method and apparatus for compensating variation of read data in an optical data storage | Atsushi Saito, Takeshi Maeda, Kazuo Shigematsu, Wasao Takasugi | 1989-05-30 |
| 4743774 | Method and apparatus for optical detection of information | Takeshi Maeda, Shigeru Nakamura, Kazuo Shigematsu, Atsushi Saito | 1988-05-10 |
| 4646103 | Optical recording method | Kazuo Shigematsu, Takeshi Maeda, Atsushi Saitoh, Wasao Takasugi | 1987-02-24 |