Issued Patents All Time
Showing 51–75 of 80 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6141302 | Optical recording/reproducing apparatus including a mask device for masking marginal rays, in a direction perpendicular to a recording medium track, of a light beam returned from the recording medium | Takeshi Yamawaki | 2000-10-31 |
| 6127998 | Matrix substrate, liquid-crystal device incorporating the matrix substrate, and display device incorporating the liquid-crystal device | Takeshi Ichikawa, Mamoru Miyawaki, Katsumi Kurematsu | 2000-10-03 |
| 6078371 | Liquid crystal device and liquid crystal display apparatus | Takeshi Ichikawa, Katsumi Kurematsu | 2000-06-20 |
| 6078368 | Active matrix substrate, liquid crystal apparatus using the same and display apparatus using such liquid crystal apparatus | Takeshi Ichikawa, Mamoru Miyawaki, Katsumi Kurematsu | 2000-06-20 |
| 6057897 | Active matrix display in which adjacent transistors share a common source region | Takeshi Ichikawa, Mamoru Miyawaki, Katsumi Kurematsu | 2000-05-02 |
| 6045228 | Optical modulation device and projector | Junko Kuramochi | 2000-04-04 |
| 6040881 | Projection type display apparatus with color optimized anti-reflection films | — | 2000-03-21 |
| 5999335 | Projecting apparatus | Junko Kuramochi, Saburo Sugawara | 1999-12-07 |
| 5745449 | Optical information recording/reproducing method and apparatus for determining a relative tracking offset amount of light spots on a recording medium to perform tracking control | — | 1998-04-28 |
| 5608716 | Optical recording/reproducing apparatus including a semiconductor laser having a plurality of radiative portions having different physical characteristics | Takeshi Yamawaki | 1997-03-04 |
| 5594711 | Optical recording and reproducing apparatus using a plurality of light spots for recording and reproducing | — | 1997-01-14 |
| 5546373 | Optical recording and/or reproducing apparatus including a two prism beam splitter for size reduction | — | 1996-08-13 |
| 5532990 | Optical information processing method and apparatus including measuring and correcting the offset of a tracking error signal from an output of a photodetector using a vibrating objective lens | Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hisatoshi Baba, Hirotake Ando +3 more | 1996-07-02 |
| 5517475 | Optical information processing apparatus in which the offset of a tracking error signal is corrected in accordance with a relationship stored in a memory, in response to a position detection output signal | Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hisatoshi Baba, Hirotake Ando +3 more | 1996-05-14 |
| 5517480 | Magneto-optical information reproducing apparatus that splits a light beam into at least three light beams advancing in the same direction | Kazuhiko Matsuoka | 1996-05-14 |
| 5485438 | Method and apparatus for optically recording and/or reproducing information | — | 1996-01-16 |
| 5404346 | Optical information processing apparatus including a correction circuit for correcting non-linearity of an output of a position detection circuit | Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hisatoshi Baba, Hirotake Ando +3 more | 1995-04-04 |
| 5386404 | Optical information processing apparatus | — | 1995-01-31 |
| 5347503 | Optical information processing apparatus for correcting linearity of a photosensor output with respect to power of an emitted light beam | Tadashi Kato, Masayuki Usui, Yoshihiko Watanabe, Hisatoshi Baba, Hirotake Ando +3 more | 1994-09-13 |
| 5293371 | Optical head for a magneto-optical information reproducing apparatus including a light beam splitter having a first glass, a uniaxial crystal and a second glass arranged in sequence | — | 1994-03-08 |
| 5293569 | Magneto-optical recording/reproducing apparatus including an optical head with an optical element having a plurality of prisms | — | 1994-03-08 |
| 5231621 | Focus detector which serves to split off a portion of a detected light beam only when the detected light beam is not refocused at an expected refocus point | Hiroshi Matsui, Hideaki Yano, Yasuo Nakamura | 1993-07-27 |
| 5202867 | Condensing optical system with corrected chromatic aberration, and information recording/reproducing apparatus using this optical system | Hiroshi Matsui | 1993-04-13 |
| 5039202 | Optical system driving apparatus | Hideo Nakajima, Tohru Tatsuno, Yasuo Nakamura | 1991-08-13 |
| 5029261 | Apparatus for detecting position of light beam on object surface by comparing detection beams split near focal point | Yasuo Nakamura | 1991-07-02 |