Inventor · disambiguated record
Hisashi Yamada
Also filed as: YAMADA HISASHI
128 granted patents·38 pending applications·2,682 citations·filing 1975–2025
99Inventor score
Files withTOSHIBA KK67MITSUBISHI ELECTRIC CORP20SUMITOMO CHEMICAL CO11TOKYO SHIBAURA ELECTRIC CO10UNIV CALIFORNIA7
Top patents by PatentIndex Score
166 records- 0197US6301663B1Copy protection apparatus and information recording medium used in this copy protection apparatusTOSHIBA KK·Filed 1998·Granted Oct 9, 2001·139 cites·10 claims
- 0296US6490683B1Optical disk having electronic watermark, reproducing apparatus thereof and copy protecting method using the sameTOSHIBA KK·Filed 1998·Granted Dec 3, 2002·270 cites·22 claims
- 0396US4800339AAmplifier circuitTOSHIBA KK·Filed 1987·Granted Jan 24, 1989·68 cites·13 claims
- 0496US4491553AMethod for producing filler-loaded thermoplastic resin compositeLION CORP·Filed 1982·Granted Jan 1, 1985·138 cites·14 claims
- 0596US4432610ALiquid crystal display deviceTOKYO SHIBAURA ELECTRIC CO·Filed 1981·Granted Feb 21, 1984·142 cites·19 claims
- 0695US6144743AInformation recording medium, recording apparatus, information transmission system, and decryption apparatusTOSHIBA KK·Filed 1998·Granted Nov 7, 2000·86 cites·1 claims
- 0794US7065648B1Mutual authentication method, recording apparatus, reproducing apparatus, and recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Jun 20, 2006·55 cites·7 claims
- 0894US6795381B2Multi-body multi-purpose information processing apparatusTOSHIBA KK·Filed 2002·Granted Sep 21, 2004·54 cites·15 claims
- 0993US7721343B2Copyright management method, information recording/reproducing method and device, and information recording medium and method of manufacturing the mediumKABUSHIKI KAISH TOSHIBA·Filed 2005·Granted May 18, 2010·19 cites·4 claims
- 1093US7181008B1Contents management method, content management apparatus, and recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Feb 20, 2007·45 cites·3 claims
- 1193US6847950B1Contents managing method and contents managing apparatusTOSHIBA KK·Filed 2000·Granted Jan 25, 2005·85 cites·18 claims
- 1293US5903531AReproduction device for optical disksTOSHIBA KK·Filed 1997·Granted May 11, 1999·115 cites·10 claims
- 1391US7505584B2Contents management method, contents management apparatus, and recording mediumTOSHIBA KK·Filed 2006·Granted Mar 17, 2009·12 cites·3 claims
- 1491US4830779AElectrically conductive resin compositionLION CORP·Filed 1987·Granted May 16, 1989·55 cites·9 claims
- 1590US7137012B1Storage medium and contents protection method using the storage mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Nov 14, 2006·81 cites·12 claims
- 1689US7249305B2Signal processing method and apparatus, signal reproducing method and apparatus, and recording mediumTOSHIBA KK·Filed 2005·Granted Jul 24, 2007·8 cites·24 claims
- 1789US5930214ARecording/reproducing optical head apparatus compatible with different optical mediaTOSHIBA KK·Filed 1995·Granted Jul 27, 1999·60 cites·79 claims
- 1889US4366442AAmplifier with muting circuitTOKYO SHIBAURA ELECTRIC CO·Filed 1980·Granted Dec 28, 1982·34 cites·6 claims
- 1988US7795558B2Electric discharge machine and electric discharge machining methodMITSUBISHI ELECTRIC CORP·Filed 2006·Granted Sep 14, 2010·9 cites·11 claims
- 2088US6438692B2Copy protection apparatus and information recording medium used in this copy protection apparatusTOSHIBA KK·Filed 2001·Granted Aug 20, 2002·43 cites·9 claims
- 2188US5729510AOptical head used for recording on optical recording medium having various thicknesses, warpage and the likeTOSHIBA KK·Filed 1995·Granted Mar 17, 1998·54 cites·52 claims
- 2287US8158497B2Planar nonpolar m-plane group III nitride films grown on miscut substratesHIRAI ASAKO·Filed 2008·Granted Apr 17, 2012·9 cites·20 claims
- 2387US7847280B2Nonpolar III-nitride light emitting diodes with long wavelength emissionUNIV CALIFORNIA·Filed 2008·Granted Dec 7, 2010·10 cites·27 claims
- 2487US6952486B2Digital watermark embedding method and apparatus, and digital watermarkTOSHIBA KK·Filed 2004·Granted Oct 4, 2005·35 cites·21 claims
- 2587US6159572AInformation recording medium and method of manufacturing resinous substrate for use in the recording mediumTOSHIBA KK·Filed 1999·Granted Dec 12, 2000·48 cites·28 claims
- 2686US8003911B2Wire electrical discharge machining apparatusMITSUBISHI ELECTRIC CORP·Filed 2006·Granted Aug 23, 2011·7 cites·15 claims
- 2786US6141483ARecording medium for recording data, reproducing apparatus for reproducing data recorded on recording medium, and data reproducing system for reproducing data recorded on recording medium via network or the likeTOSHIBA KK·Filed 1997·Granted Oct 31, 2000·47 cites·1 claims
- 2885US5475210ANoise reduction system for optical record and reproduction apparatus using auto-power controlled semiconductor laser deviceTOSHIBA KK·Filed 1993·Granted Dec 12, 1995·39 cites·32 claims
- 2984US10763332B2Semiconductor wafer and method of inspecting semiconductor waferSUMITOMO CHEMICAL CO·Filed 2017·Granted Sep 1, 2020·4 cites·15 claims
- 3084US6747236B1Wire electric discharge machining apparatusMITSUBISHI ELECTRIC CORP·Filed 2000·Granted Jun 8, 2004·15 cites·7 claims
- 3182US6815630B1Wire electric discharge machineMITSUBISHI ELECTRIC CORP·Filed 2000·Granted Nov 9, 2004·18 cites·5 claims
- 3281US7821908B2Optical disc, optical disc apparatus, and optical disc reproducing methodTOSHIBA KK·Filed 2005·Granted Oct 26, 2010·5 cites·6 claims
- 3381US7017100B2Signal processing method and apparatus, signal reproducing method and apparatus, and recording mediumTOSHIBA KK·Filed 2002·Granted Mar 21, 2006·12 cites·24 claims
- 3480US8044417B2Enhancement of optical polarization of nitride light-emitting diodes by increased indium incorporationUNIV CALIFORNIA·Filed 2009·Granted Oct 25, 2011·6 cites·20 claims
- 3580US6787727B2Automatic wire electrode feeder for wire electric discharge machining devicesMITSUBISHI ELECTRIC CORP·Filed 2001·Granted Sep 7, 2004·12 cites·4 claims
- 3680US6750917B2Device interconnect system using analog lineTOSHIBA KK·Filed 2001·Granted Jun 15, 2004·29 cites·15 claims
- 3780US6741723B2Digital watermark embedding method and apparatus, and digital watermarkTOSHIBA KK·Filed 2002·Granted May 25, 2004·23 cites·5 claims
- 3880US6291047B1Information recording medium and method of manufacturing resinous substrates for use in the recording mediumTOSHIBA KK·Filed 2000·Granted Sep 18, 2001·7 cites·37 claims
- 3979US6556679B1Copy-guard system and information recording medium used in the same systemTOSHIBA KK·Filed 1998·Granted Apr 29, 2003·66 cites·40 claims
- 4079US4975557AWire cutting electric discharge machine with nozzle collision detectionMITSUBISHI ELECTRIC CORP·Filed 1989·Granted Dec 4, 1990·18 cites·3 claims
- 4177US8586891B2Wire electrical discharge machining apparatusHASHIMOTO TAKASHI·Filed 2006·Granted Nov 19, 2013·4 cites·17 claims
- 4277US5774078ASingle merging bit DC-suppressed run length limited codingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Jun 30, 1998·43 cites·18 claims
- 4377US5756956AWire-cut electric discharge machining apparatus and control method thereforMITSUBISHI ELECTRIC CORP·Filed 1995·Granted May 26, 1998·37 cites·18 claims
- 4477US5325242AMagnetic recording/reproducing apparatus for decreasing an error rate in recording/reproducing a digital signalTOSHIBA KK·Filed 1992·Granted Jun 28, 1994·32 cites·2 claims
- 4577US4542370ACascade-comparator A/D converterTOKYO SHIBAURA ELECTRIC CO·Filed 1982·Granted Sep 17, 1985·25 cites·21 claims
- 4676US7092776B2Production control system, production control method and production control programTOSHIBA KK·Filed 2003·Granted Aug 15, 2006·13 cites·8 claims
- 4774US6465069B1Information recording medium and method of manufacturing resinous substrate for use in the recording mediumTOSHIBA KK·Filed 2000·Granted Oct 15, 2002·4 cites·12 claims
- 4874US5045662AAutomatic wire feeding method and apparatus for electrodischarge machiningMITSUBISHI ELECTRIC CORP·Filed 1990·Granted Sep 3, 1991·32 cites·16 claims
- 4972USRE44154EInformation recording medium and method of manufacturing resinous substrate for use in the recording mediumKOBAYASHI TADASHI·Filed 2009·Granted Apr 16, 2013·0 cites·13 claims
- 5072US8278128B2Enhancement of optical polarization of nitride light-emitting diodes by wafer off-axis cutMASUI HISASHI·Filed 2009·Granted Oct 2, 2012·6 cites·26 claims
Showing the top 50 of 166 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →