Inventor · disambiguated record
Seiji Kajiyama
Also filed as: KAJIYAMA SEIJI
29 granted patents·2 pending applications·559 citations·filing 1995–2009
97Inventor score
Top patents by PatentIndex Score
31 records- 0192US5917791AApparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefromSANYO ELECTRIC CO·Filed 1996·Granted Jun 29, 1999·71 cites·13 claims
- 0291US7376166B2Semiconductor laser apparatus and optical pickup apparatusSANYO ELECTRIC CO·Filed 2006·Granted May 20, 2008·16 cites·11 claims
- 0389US6552990B1Optical head for two different disk thicknesses with a light beam diameter control deviceSANYO ELECTRIC CO·Filed 1997·Granted Apr 22, 2003·66 cites·1 claims
- 0487US6201777B1Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefromSANYO ELECTRIC CO·Filed 1999·Granted Mar 13, 2001·44 cites·5 claims
- 0587US6108296AOptical recording disc capable of preventing illegal copySANYO ELECTRIC CO·Filed 1998·Granted Aug 22, 2000·43 cites·2 claims
- 0683US5787061AOptical disc recording reproducing apparatus recording/reproducing information to/from optical discs according to different standardsSANYO ELECTRIC CO·Filed 1996·Granted Jul 28, 1998·40 cites·59 claims
- 0781US5856965AOptical disc readout apparatus for different types of optical discsSANYO ELECTRIC CO·Filed 1996·Granted Jan 5, 1999·36 cites·15 claims
- 0880US6262967B1Optical recording disc capable of preventing illegal copySANYO ELECTRIC CO·Filed 2000·Granted Jul 17, 2001·12 cites·4 claims
- 0979US6438097B1Optical recording disc capable of preventing illegal copySANYO ELECTRIC CO·Filed 2000·Granted Aug 20, 2002·12 cites·1 claims
- 1079US5777970AOptical disk readout apparatusSANYO ELECTRIC CO·Filed 1996·Granted Jul 7, 1998·35 cites·49 claims
- 1175US6167019AOptical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standardsSANYO ELECTRIC CO·Filed 1999·Granted Dec 26, 2000·19 cites·3 claims
- 1274US6181668B1Optical pickup device and wavelength selective diffraction gratingSANYO ELECTRIC CO·Filed 1997·Granted Jan 30, 2001·26 cites·34 claims
- 1374US6049518AOptical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standardsSANYO ELECTRIC CO·Filed 1996·Granted Apr 11, 2000·19 cites·5 claims
- 1474US5687154AOptical pickup device which can be adapted to plurality of types of optical disksSANYO ELECTRIC CO·Filed 1995·Granted Nov 11, 1997·22 cites·18 claims
- 1569US6574182B1Optical pickup compatible with a plurality of types of optical disks having different thicknessesSANYO ELECTRIC CO·Filed 1999·Granted Jun 3, 2003·20 cites·17 claims
- 1669US6321028B1Optical disk recording/reproduction apparatus for recording/reproducing information to/from optical disk of different standardsSANYO ELECTRIC CO·Filed 1996·Granted Nov 20, 2001·21 cites·37 claims
- 1769US5870371AOptical pickup device which can be adapted to plurality of types of optical disksSANYO ELECTRIC CO·Filed 1997·Granted Feb 9, 1999·18 cites·17 claims
- 1868US7609606B2Optical pickup deviceSANYO ELECTRIC CO·Filed 2005·Granted Oct 27, 2009·1 cites·14 claims
- 1965US6137764AOptical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standardsSANYO ELECTRIC CO·Filed 1999·Granted Oct 24, 2000·12 cites·1 claims
- 2058US6693856B1Magneto-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 magnetSANYO ELECTRIC CO·Filed 2001·Granted Feb 17, 2004·5 cites·4 claims
- 2152US7525897B2Optical pickup deviceSANYO ELECTRIC CO·Filed 2005·Granted Apr 28, 2009·0 cites·12 claims
- 2250US7903507B2Optical pickup device and method of laying out the sameSANYO ELECTRIC CO·Filed 2006·Granted Mar 8, 2011·0 cites·12 claims
- 2350US7209415B2Optical pickup device and recording and/or reproducing deviceSANYO ELECTRIC CO·Filed 2003·Granted Apr 24, 2007·1 cites·16 claims
- 2450US6160783AOptical pick-up deviceSANYO ELECTRIC CO·Filed 1998·Granted Dec 12, 2000·9 cites·7 claims
- 2549US2009245072A1Optical pickup apparatusSANYO ELECTRONIC CO LTD·Filed 2009·Application pending·0 cites
- 2648US2007115767A1Optical pickup deviceSANYO ELECTRIC CO·Filed 2006·Application pending·0 cites
- 2745US7782735B2Optical pickup device capable of handling a plurality of laser light beams having different wavelengthsSANYO ELECTRIC CO·Filed 2005·Granted Aug 24, 2010·0 cites·3 claims
- 2845US7420894B2Optical pickup deviceSANYO ELECTRIC CO·Filed 2005·Granted Sep 2, 2008·0 cites·7 claims
- 2944US7558184B2Optical pickup deviceSANYO ELECTRIC CO·Filed 2005·Granted Jul 7, 2009·0 cites·8 claims
- 3041US6025866ASuperresolution optical pickup apparatusSANYO ELECTRIC CO·Filed 1998·Granted Feb 15, 2000·9 cites·10 claims
- 3138US6122242AOptical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standardsSANYO ELECTRIC CO·Filed 1999·Granted Sep 19, 2000·2 cites·1 claims
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