Inventor · disambiguated record
Sadao Mizuno
Also filed as: MIZUNO SADAO
60 granted patents·3 pending applications·1,416 citations·filing 1988–2011
99Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD44PANASONIC CORP8AISIN SEIKI5WADA HIDENORI2HAYASHI HIDEKI1
Top patents by PatentIndex Score
63 records- 0198US5703856AOptical head and optical data recording and reproducing apparatus having the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Dec 30, 1997·136 cites·42 claims
- 0297US6995909B1Lens, optical head, optical information writing/reading apparatus and optical information recording medium writing/reading methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Feb 7, 2006·68 cites·9 claims
- 0395US5446565ACompound objective lens having two focal pointsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Aug 29, 1995·213 cites·34 claims
- 0495US5255260AOptical recording apparatus employing stacked recording media with spiral grooves and floating optical headsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1990·Granted Oct 19, 1993·88 cites·17 claims
- 0593US6532202B1Optical element, optical head and optical recording reproducing apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Mar 11, 2003·48 cites·31 claims
- 0691US5986779AMultiple focus lens, an optical head apparatus and an optical information recording-reproducing apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Nov 16, 1999·64 cites·21 claims
- 0791US5815293ACompound objective lens having two focal pointsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Sep 29, 1998·83 cites·18 claims
- 0890US5754512ACorrection elements to lower light intensity around an optical axis of an optical head with a plurality of focal pointsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted May 19, 1998·58 cites·19 claims
- 0987US5644413AOptical head for adjusting a positional relation between the information medium and the optical headMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Jul 1, 1997·51 cites·38 claims
- 1086US6480454B1Optical element, optical head using the optical element, and optical recording and reproducing apparatus using the optical elementMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Nov 12, 2002·44 cites·44 claims
- 1184US5627816AMultilayer optical disk and apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted May 6, 1997·32 cites·6 claims
- 1283US6798723B2Optical pickup head and information recording/reproducing deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Sep 28, 2004·15 cites·59 claims
- 1383US5347504AOptical disk apparatus for optically recording or reproducing information on an optical recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Sep 13, 1994·26 cites·5 claims
- 1482US7889622B2Optical head for optical recorder/reproducerPANASONIC CORP·Filed 2005·Granted Feb 15, 2011·4 cites·6 claims
- 1581USRE41455EObjective lens for optical disks having different thicknessesPANASONIC CORP·Filed 2005·Granted Jul 27, 2010·3 cites·36 claims
- 1681US7330419B2Optical head device and optical information apparatus using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2006·Granted Feb 12, 2008·3 cites·13 claims
- 1780USRE38943ECompound objective lens for optical disks having different thicknessesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jan 24, 2006·17 cites·123 claims
- 1880US5790503AOptical headMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Aug 4, 1998·29 cites·26 claims
- 1979US5912868AOptical head for reproducing data from first and second optical disksMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Jun 15, 1999·28 cites·5 claims
- 2079US5563873AMultilayer optical disk and apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Oct 8, 1996·25 cites·7 claims
- 2179US5418774AOptical head system and its optical discMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1993·Granted May 23, 1995·29 cites·3 claims
- 2278US6084845AOptical head and an optical disk apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jul 4, 2000·30 cites·18 claims
- 2378US5978346AOptical headMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Nov 2, 1999·26 cites·12 claims
- 2476US7248409B2Optical element, optical lens, optical head apparatus, optical information apparatus, computer, optical information medium player, car navigation system, optical information medium recorder, and optical information medium serverMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Jul 24, 2007·10 cites·43 claims
- 2576US6927375B2Optical element, optical head and optical information processorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Aug 9, 2005·11 cites·12 claims
- 2675US6873588B1Converging element, optical head, and apparatus and method of optically recording and reproducing informationMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Mar 29, 2005·13 cites·23 claims
- 2775US5345072AFocus detection device for reading information from an optical recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Sep 6, 1994·24 cites·12 claims
- 2874US7110342B2Optical head device and optical information apparatus using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Sep 19, 2006·7 cites·12 claims
- 2974US4991919AOptical head apparatus including concentric, periodic grating in a waveguideMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1988·Granted Feb 12, 1991·19 cites·16 claims
- 3073US8483034B2Optical pickup, inclination angle detection method, optical information device and information processing deviceWADA HIDENORI·Filed 2011·Granted Jul 9, 2013·3 cites·19 claims
- 3173US6573685B2Method of replacing secondary batteryMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jun 3, 2003·34 cites·12 claims
- 3271US7480227B2Optical head device and optical information apparatus using the samePANASONIC CORP·Filed 2006·Granted Jan 20, 2009·1 cites·16 claims
- 3370US8184522B2Optical head for optical recorder/reproducerWADA HIDENORI·Filed 2011·Granted May 22, 2012·2 cites·7 claims
- 3469US5430701AOptical disk apparatus for optically recording or reproducing information on an optical recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Jul 4, 1995·14 cites·8 claims
- 3568US8004954B2Optical pickup, optical disk device, computer and optical disk recorderPANASONIC CORP·Filed 2006·Granted Aug 23, 2011·1 cites·18 claims
- 3667US7254107B2Optical head and optical recording and reproducing apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Aug 7, 2007·6 cites·28 claims
- 3767US5768251AOptical recording/reproducing apparatus for high density multilayered disksMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Jun 16, 1998·15 cites·8 claims
- 3865US6069860AOptical head with objective lens having different numerical apertures to minimize light aberration with respect to optical disks of different thicknessesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted May 30, 2000·15 cites·9 claims
- 3964US6859428B2Converging element, optical head, and apparatus and method of optically recording and reproducing informationMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Feb 22, 2005·4 cites·18 claims
- 4064US5148421AOptical headMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1991·Granted Sep 15, 1992·15 cites·4 claims
- 4163US5920537ACorrection element of lower light intensity around an optical axis of an optical head with a plurality of focal pointsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jul 6, 1999·14 cites·6 claims
- 4261US5440536AOptical disk apparatus for producing information recorded on a recording trackMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Aug 8, 1995·10 cites·5 claims
- 4360US6272099B1Objective lens with center and periphery portions producing reciprocal interference, and optical head and optical disk device using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Aug 7, 2001·3 cites·14 claims
- 4457USRE43126EOptical pickup head and information recording/reproducing deviceHAYASHI HIDEKI·Filed 2006·Granted Jan 24, 2012·0 cites·73 claims
- 4557US6920102B2Converging element, optical head, and apparatus and method of optically recording and reproducing informationMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Jul 19, 2005·2 cites·26 claims
- 4656US5695390AFinishing machines for internal spline tooth surfacesAISIN SEIKI·Filed 1995·Granted Dec 9, 1997·19 cites·10 claims
- 4755US7079456B2Optical recording head capable of correcting spherical aberrationMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Jul 18, 2006·2 cites·22 claims
- 4854US7760612B2Optical element and optical head device using it, and optical information device using this optical head device, and computer, optical disk player, car navigation system, optical disk recorder and optical disk server using this optical information devicePANASONIC CORP·Filed 2003·Granted Jul 20, 2010·2 cites·44 claims
- 4954US7656777B2Optical recording medium, optical information processor, and optical recording/reproducing methodPANASONIC CORP·Filed 2003·Granted Feb 2, 2010·2 cites·14 claims
- 5054US2007064574A1Semiconductor laser apparatus, optical pick-up and optical information apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2006·Application pending·0 cites
Showing the top 50 of 63 patent records by PatentIndex Score.
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