Issued Patents All Time
Showing 26–50 of 79 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6310846 | Method for controlling the recording conditions for a second mark using previously determined reproducing conditions for a first mark for optical memory device | — | 2001-10-30 |
| 6288992 | Optical reproducing device and optical memory medium | Tetsuya Okumura | 2001-09-11 |
| 6172956 | Optical recording medium and optical recording/reproducing device, and manufacturing method of optical recording medium | — | 2001-01-09 |
| 6125085 | Optical recording method and device for optimally controlling the width of the recording marks | Tetsuya Okumura, Shigemi Maeda | 2000-09-26 |
| 5997339 | Cable connection | Hajimu Iwai, Fabio Righi | 1999-12-07 |
| 5852599 | Optical recording medium and optical recording/reproducing device, and manufacturing method of optical recording medium | — | 1998-12-22 |
| 5781513 | Magnetic-field modulation recording method and device for preventing residual information from remaining after overwriting | — | 1998-07-14 |
| 5724319 | Magneto-optical recording apparatus having transient response correction for magnetic head coil currents | Tomoyuki Miyake, Shigeo Terashima | 1998-03-03 |
| 5715217 | Method and apparatus for tracking correction and optical disk for use therein | — | 1998-02-03 |
| 5694386 | Interpolating gain amplifier for information reproducing apparatus | Hiroshige Hirajima | 1997-12-02 |
| 5673046 | Analog-to-digital conversion circuit for use in information reproduction apparatuses | Hiroshige Hirajima, Tsuneo Fujiwara | 1997-09-30 |
| 5638350 | Multibeam recording/reproducing apparatus in which direction of movement of plurality of light beams is determined based on order in which each of light beams crosses track | — | 1997-06-10 |
| 5617400 | Magneto-optical recording and reproducing apparatus with layer aperture control | — | 1997-04-01 |
| 5604725 | Information recording method and collector and distributor for recording information | — | 1997-02-18 |
| 5563858 | Multi-beam recording-reproduction apparatus with improved positioning accuracy and track counting | — | 1996-10-08 |
| 5553043 | Information regenerating apparatus | Takeshi Yamaguchi, Hiroshige Hirashima, Shigeo Terashima | 1996-09-03 |
| 5548570 | Optical reproducing circuit having, a binarized signal pulse compensation circuit | Hiroshige Hirajima, Takeshi Yamaguchi | 1996-08-20 |
| 5546364 | Magneto-optical memory apparatus utilizing edges or recording mark to manage data | Toshihisa Deguchi, Kunio Kojima, Takeshi Yamaguchi, Shigeo Terashima, Akira Takahashi +1 more | 1996-08-13 |
| 5537381 | Test-writing recording control method and test-writing recording control apparatus and optical recording medium | — | 1996-07-16 |
| 5483513 | Recording state detecting apparatus and optical recording medium | — | 1996-01-09 |
| 5465248 | Deflecting a light beam in the same direction and speed of a recording medium by a rotating polygon or a holographic disk | — | 1995-11-07 |
| 5459705 | Optical recording medium driving apparatus capable of accurately detecting position of optical head | Hirotsugu Matoba, Kunio Kojima | 1995-10-17 |
| 5448494 | Mask data processing apparatus for integrated circuit production | Kenichi Kobayashi, Masahiro Yumoto, Nobuyasu Horiuchi, Akihiro Okazaki, Hiroaki Tsuda | 1995-09-05 |
| 5444688 | Information reproducing circuit | — | 1995-08-22 |
| 5377054 | Digital information reproducing apparatus | Takeshi Yamaguchi | 1994-12-27 |