Inventor
KAJIYAMA SEIJI
JP29 patents
Patents
29 patentsUS6552990B1Apr 22, 2003
Optical head for two different disk thicknesses with a light beam diameter control device
SANYO ELECTRIC CO66 citations96
US6201777B1Mar 13, 2001
Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom
SANYO ELECTRIC CO44 citations96
US5917791AJun 29, 1999
Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom
SANYO ELECTRIC CO71 citations96
US6108296AAug 22, 2000
Optical recording disc capable of preventing illegal copy
SANYO ELECTRIC CO43 citations94
US6574182B1Jun 3, 2003
Optical pickup compatible with a plurality of types of optical disks having different thicknesses
SANYO ELECTRIC CO20 citations92
US6321028B1Nov 20, 2001
Optical disk recording/reproduction apparatus for recording/reproducing information to/from optical disk of different standards
SANYO ELECTRIC CO21 citations92
US6181668B1Jan 30, 2001
Optical pickup device and wavelength selective diffraction grating
SANYO ELECTRIC CO26 citations92
US6167019ADec 26, 2000
Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
SANYO ELECTRIC CO19 citations92
US6049518AApr 11, 2000
Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
SANYO ELECTRIC CO19 citations92
US5870371AFeb 9, 1999
Optical pickup device which can be adapted to plurality of types of optical disks
SANYO ELECTRIC CO18 citations92
US5856965AJan 5, 1999
Optical disc readout apparatus for different types of optical discs
SANYO ELECTRIC CO36 citations92
US5787061AJul 28, 1998
Optical disc recording reproducing apparatus recording/reproducing information to/from optical discs according to different standards
SANYO ELECTRIC CO40 citations92
US5777970AJul 7, 1998
Optical disk readout apparatus
SANYO ELECTRIC CO35 citations92
US5687154ANov 11, 1997
Optical pickup device which can be adapted to plurality of types of optical disks
SANYO ELECTRIC CO22 citations92
US7376166B2May 20, 2008
Semiconductor laser apparatus and optical pickup apparatus
SANYO ELECTRIC CO16 citations84
US6137764AOct 24, 2000
Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
SANYO ELECTRIC CO12 citations82
US6160783ADec 12, 2000
Optical pick-up device
SANYO ELECTRIC CO9 citations73
US6025866AFeb 15, 2000
Superresolution optical pickup apparatus
SANYO ELECTRIC CO9 citations73
US6438097B1Aug 20, 2002
Optical recording disc capable of preventing illegal copy
SANYO ELECTRIC CO12 citations72
US6262967B1Jul 17, 2001
Optical recording disc capable of preventing illegal copy
SANYO ELECTRIC CO12 citations72
US6122242ASep 19, 2000
Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards
SANYO ELECTRIC CO2 citations63
US6693856B1Feb 17, 2004
Magneto-optical disk apparatus capable of accurate reproduction of signal by removing magnetic influence by magnet included in optical head and method of detecting intensity of magnetic field applied by magnet
SANYO ELECTRIC CO5 citations57
US7609606B2Oct 27, 2009
Optical pickup device
SANYO ELECTRIC CO1 citations52
US7525897B2Apr 28, 2009
Optical pickup device
SANYO ELECTRIC CO0 citations52
US7209415B2Apr 24, 2007
Optical pickup device and recording and/or reproducing device
SANYO ELECTRIC CO1 citations52
US7903507B2Mar 8, 2011
Optical pickup device and method of laying out the same
SANYO ELECTRIC CO0 citations42
US7782735B2Aug 24, 2010
Optical pickup device capable of handling a plurality of laser light beams having different wavelengths
SANYO ELECTRIC CO0 citations42
US7420894B2Sep 2, 2008
Optical pickup device
SANYO ELECTRIC CO0 citations42
US7558184B2Jul 7, 2009
Optical pickup device
SANYO ELECTRIC CO0 citations36