Issued Patents All Time
Showing 1–25 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8149661 | Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup | Tsutomu Ishimoto | 2012-04-03 |
| 8072871 | Short-pulse light-source device, laser driving method, optical pickup, and optical disc apparatus | — | 2011-12-06 |
| 7940606 | Signal detecting device and signal detecting method | Ariyoshi Nakaoki, Naoto Kojima, Koji Sekiguchi, Osamu Kawakubo | 2011-05-10 |
| 7656753 | Optical recording, producing apparatus, and method with peak-hold voltage features | Yasuyuki Takeshita | 2010-02-02 |
| 7454771 | Optical recording medium and disc cartridge | Naohiro Netsu, Yoshitaka Aoki, Tetsu Watanabe, Yasuaki Maeda, Takuya Kaeriyama | 2008-11-18 |
| 7423939 | Method for manufacturing magneto-optical recording medium | Takeshi Miki, Yasuhito Tanaka, Goro Fujita, Tetsuhiro Sakamoto | 2008-09-09 |
| 7305689 | Optical recording medium and disc cartridge | Naohiro Netsu, Yoshitaka Aoki, Tetsu Watanabe, Yasuaki Maeda, Takuya Kaeriyama | 2007-12-04 |
| 7190641 | Optical recording, producing apparatus, and method with peak-hold voltage features | Yasuyuki Takeshita | 2007-03-13 |
| 7060373 | Magneto-optical recording medium and signal reproduction method | Tetsuhiro Sakamoto, Kazutomo Miyata, Teruyuki Ota, Makoto Watanabe, Yasuhito Tanaka +2 more | 2006-06-13 |
| 6944100 | Method for reproducing information data from a magneto-optical storage medium in reverse direction with recording | Tetsuhiro Sakamoto, Yasuhito Tanaka | 2005-09-13 |
| 6785222 | Read-only optical recording medium and disc cartridge | Naohiro Netsu, Yoshitaka Aoki, Tetsu Watanabe, Yasuaki Maeda, Takuya Kaeriyama | 2004-08-31 |
| 6747943 | Optical recording medium and disc cartridge | Naohiro Netsu, Yoshitaka Aoki, Tetsu Watanabe, Yasuaki Maeda, Takuya Kaeriyama | 2004-06-08 |
| 6741526 | Magnetic head device and recording/reproducing apparatus using the magnetic head device | Naohiro Netsu, Tomohiro Koda | 2004-05-25 |
| 6704275 | Optical recording medium and disc cartridge having 2 GB capacity | Naohiro Netsu, Yoshitaka Aoki, Tetsu Watanabe, Yasuaki Maeda, Takuya Kaeriyama | 2004-03-09 |
| 6392977 | Optical pickup with a hologram to limit the aperture of two light beams with different wavelengths | Nobuhiko Ando | 2002-05-21 |
| 6288990 | Reproducing apparatus, recording apparatus, and recording medium | Yasushi Maeda | 2001-09-11 |
| 6205104 | Recording/reproducing apparatus for compressed data | Hideki Nagashima, Ryo Ando, Yasuaki Maeda, Hideo Obata, Tadao Yoshida | 2001-03-20 |
| 5981936 | Photo detector circuit having a current mirror circuit | — | 1999-11-09 |
| 5963521 | Recording and/or reproducing method and apparatus with dubbing mode | Hideki Nagashima, Ryo Ando, Yasuaki Maeda, Hideo Obata, Tadao Yoshida | 1999-10-05 |
| 5859834 | Optical disc with magnetic member in a recessed portion thereof and method for producing said optical disc | Kenji Takahashi, Katsuaki Tsurushima, Tadao Yoshida, Hirotoshi Fujisawa, Hiroshi Mukawa | 1999-01-12 |
| 5818804 | Defect detecting circuit and reproducing apparatus having the defect detecting circuit | Hideo Obata, Ryo Ando | 1998-10-06 |
| 5650991 | Magneto-optical disc having preformatted information to prevent unauthorized data duplication | — | 1997-07-22 |
| 5559769 | Recording/reproducing apparatus for both read-only and magneto-optical disc-shaped recording medium | Nobuhiko Ando, Ryo Ando | 1996-09-24 |
| 5528569 | Recording medium and a method and apparatus for recording and reproducing digital data in data clusters and cluster linking sectors on the recording medium | Yasuaki Maeda | 1996-06-18 |
| 5523994 | Magneto-optical recording/reproducing apparatus with optical pickup device having a multi-layer dielectric film beam splitter | Nobuhiko Ando | 1996-06-04 |