Inventor · disambiguated record
Kazuhiko Fujiie
Also filed as: FUJIIE KAZUHIKO
46 granted patents·10 pending applications·1,295 citations·filing 1982–2012
99Inventor score
Top patents by PatentIndex Score
56 records- 0197US5363362AApparatus for reproducing recorded data comprising interleaved clusters and cluster linking sectorsSONY CORP·Filed 1993·Granted Nov 8, 1994·125 cites·3 claims
- 0297US5243588AMethod and apparatus for reading digital data bursts comprising data clusters and cluster linking sectorsSONY CORP·Filed 1991·Granted Sep 7, 1993·117 cites·9 claims
- 0396US5003521AOptical disk discriminating deviceSONY CORP·Filed 1987·Granted Mar 26, 1991·73 cites·8 claims
- 0495US6288990B1Reproducing apparatus, recording apparatus, and recording mediumSONY CORP·Filed 1998·Granted Sep 11, 2001·106 cites·17 claims
- 0595US5650991AMagneto-optical disc having preformatted information to prevent unauthorized data duplicationSONY CORP·Filed 1992·Granted Jul 22, 1997·74 cites·6 claims
- 0695US5528569ARecording medium and a method and apparatus for recording and reproducing digital data in data clusters and cluster linking sectors on the recording mediumSONY CORP·Filed 1992·Granted Jun 18, 1996·75 cites·13 claims
- 0794US6205104B1Recording/reproducing apparatus for compressed dataSONY CORP·Filed 1993·Granted Mar 20, 2001·73 cites·66 claims
- 0894US4587644ATracking servocontrol circuits for reducing gain to avoid tracking defect in an optical reproducing apparatusSONY CORP·Filed 1983·Granted May 6, 1986·47 cites·5 claims
- 0992US4862439ARecording device that identifies recordable areas of a disk recordSONY CORP·Filed 1988·Granted Aug 29, 1989·46 cites·15 claims
- 1088US6747943B2Optical recording medium and disc cartridgeSONY CORP·Filed 2001·Granted Jun 8, 2004·17 cites·2 claims
- 1188US4924455AApparatus for generating tracking error signals in a differential phase detection systemSONY CORP·Filed 1984·Granted May 8, 1990·32 cites·18 claims
- 1286US5981936APhoto detector circuit having a current mirror circuitSONY CORP·Filed 1998·Granted Nov 9, 1999·56 cites·7 claims
- 1384US5453607APhotodetector for recording/reproducing apparatus for both read only and magneto-optical disk shaped recording mediumSONY CORP·Filed 1994·Granted Sep 26, 1995·26 cites·3 claims
- 1482US5859834AOptical disc with magnetic member in a recessed portion thereof and method for producing said optical discSONY CORP·Filed 1994·Granted Jan 12, 1999·32 cites·11 claims
- 1582US4937802AMagnetic head drive circuitSONY CORP·Filed 1988·Granted Jun 26, 1990·27 cites·10 claims
- 1682US4932016AApparatus and method of recording and reproducing data using a diskSONY CORP·Filed 1987·Granted Jun 5, 1990·26 cites·8 claims
- 1781US5467336AMagneto-optical recording/reproducing apparatus with optical pickup device having a multi-layer dielectric film beam splitterSONY CORP·Filed 1993·Granted Nov 14, 1995·26 cites·7 claims
- 1880US5479387AOptical head including multiple photo detectors for reading signals and error signals for servoing from both a read-only recording medium and a magneto-optical recording mediumSONY CORP·Filed 1994·Granted Dec 26, 1995·23 cites·2 claims
- 1979US4497047AOptical disc player with focus control during search modeSONY CORP·Filed 1982·Granted Jan 29, 1985·20 cites·10 claims
- 2076US6704275B2Optical recording medium and disc cartridge having 2 GB capacitySONY CORP·Filed 2001·Granted Mar 9, 2004·7 cites·4 claims
- 2175US8149661B2Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickupISHIMOTO TSUTOMU·Filed 2009·Granted Apr 3, 2012·4 cites·10 claims
- 2275US5559769ARecording/reproducing apparatus for both read-only and magneto-optical disc-shaped recording mediumSONY CORP·Filed 1995·Granted Sep 24, 1996·22 cites·12 claims
- 2375US5523994AMagneto-optical recording/reproducing apparatus with optical pickup device having a multi-layer dielectric film beam splitterSONY CORP·Filed 1995·Granted Jun 4, 1996·24 cites·4 claims
- 2474US6785222B2Read-only optical recording medium and disc cartridgeSONY CORP·Filed 2001·Granted Aug 31, 2004·7 cites·3 claims
- 2574US6392977B2Optical pickup with a hologram to limit the aperture of two light beams with different wavelengthsSONY CORP·Filed 1999·Granted May 21, 2002·26 cites·15 claims
- 2672US4687296AOptical pickupSONY CORP·Filed 1985·Granted Aug 18, 1987·18 cites·5 claims
- 2771US5432766ACircuit for varying a loop gain of a spindle servoSONY CORP·Filed 1994·Granted Jul 11, 1995·19 cites·10 claims
- 2870US5325371ACoding/decoding apparatusSONY CORP·Filed 1991·Granted Jun 28, 1994·18 cites·11 claims
- 2970US5111442ARecordable optical disc storage device with limited storage capacity, and recording apparatus thereforSONY CORP·Filed 1989·Granted May 5, 1992·16 cites·12 claims
- 3068US7940606B2Signal detecting device and signal detecting methodSONY CORP·Filed 2009·Granted May 10, 2011·1 cites·15 claims
- 3168US7305689B2Optical recording medium and disc cartridgeSONY CORP·Filed 2004·Granted Dec 4, 2007·4 cites·2 claims
- 3268US5963521ARecording and/or reproducing method and apparatus with dubbing modeSONY CORP·Filed 1998·Granted Oct 5, 1999·20 cites·20 claims
- 3368US4491882ADisc playersSONY CORP·Filed 1982·Granted Jan 1, 1985·13 cites·4 claims
- 3467US5818804ADefect detecting circuit and reproducing apparatus having the defect detecting circuitSONY CORP·Filed 1997·Granted Oct 6, 1998·19 cites·12 claims
- 3566US7656753B2Optical recording, producing apparatus, and method with peak-hold voltage featuresSONY CORP·Filed 2007·Granted Feb 2, 2010·2 cites·24 claims
- 3666US6741526B1Magnetic head device and recording/reproducing apparatus using the magnetic head deviceSONY CORP·Filed 2000·Granted May 25, 2004·6 cites·9 claims
- 3763US7454771B2Optical recording medium and disc cartridgeSONY CORP·Filed 2007·Granted Nov 18, 2008·0 cites·2 claims
- 3862US6944100B2Method for reproducing information data from a magneto-optical storage medium in reverse direction with recordingSONY CORP·Filed 2003·Granted Sep 13, 2005·4 cites·24 claims
- 3961US4858217AOptical disk recording and reproducing deviceSONY CORP·Filed 1987·Granted Aug 15, 1989·11 cites·6 claims
- 4061US2008199602A1Method for manufacturing magneto-optical recording mediumSONY CORP·Filed 2008·Application pending·0 cites
- 4160US4539667ADisc playersSONY CORP·Filed 1982·Granted Sep 3, 1985·10 cites·6 claims
- 4257US7060373B2Magneto-optical recording medium and signal reproduction methodSONY CORP·Filed 2004·Granted Jun 13, 2006·3 cites·2 claims
- 4355US8072871B2Short-pulse light-source device, laser driving method, optical pickup, and optical disc apparatusFUJIIE KAZUHIKO·Filed 2009·Granted Dec 6, 2011·1 cites·11 claims
- 4454US7190641B2Optical recording, producing apparatus, and method with peak-hold voltage featuresSONY CORP·Filed 2001·Granted Mar 13, 2007·2 cites·31 claims
- 4553US7423939B2Method for manufacturing magneto-optical recording mediumSONY CORP·Filed 2004·Granted Sep 9, 2008·1 cites·8 claims
- 4653US4613967ADisc playerSONY CORP·Filed 1982·Granted Sep 23, 1986·9 cites·9 claims
- 4749US5402397AElectromagnetic shield device for magneto-optical recording apparatusSONY CORP·Filed 1993·Granted Mar 28, 1995·7 cites·12 claims
- 4845US2002071382A1Optical recording medium and disc cartridgeFiled 2002·Application pending·0 cites
- 4943US2013070577A1Optical recording medium, recording apparatus, recording methodSUZUKI YOSHINORI·Filed 2012·Application pending·0 cites
- 5043US2005099908A1Playback apparatus and method, and optical disk playerSONY CORP·Filed 2004·Application pending·0 cites
Showing the top 50 of 56 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →