Inventor · disambiguated record
Takao Arai
Also filed as: ARAI TAKAO · HOSHINO TAKASHI
139 granted patents·3 pending applications·3,086 citations·filing 1977–2017
99Inventor score
Files withHITACHI LTD95NEC CORP8TOSHIBA MACHINE CO LTD6NEC ELECTRONICS CORP4NTN TOYO BEARING CO LTD3
Top patents by PatentIndex Score
142 records- 0199US4539615AAzimuthal magnetic recording and reproducing apparatusHITACHI LTD·Filed 1982·Granted Sep 3, 1985·125 cites·11 claims
- 0297US4682332AMethod and apparatus for recording digital signalsHITACHI LTD·Filed 1985·Granted Jul 21, 1987·85 cites·7 claims
- 0396US4541091ACode error detection and correction method and apparatusHITACHI LTD·Filed 1983·Granted Sep 10, 1985·64 cites·13 claims
- 0496US4309726AMuting circuit in a PCM recording and reproducing apparatusHITACHI LTD·Filed 1980·Granted Jan 5, 1982·56 cites·6 claims
- 0594US5912969AInformation receiving and recording/reproducing apparatus/method having function for limiting/delimiting for protecting copyright of recording informationHITACHI LTD·Filed 1997·Granted Jun 15, 1999·95 cites·15 claims
- 0694US5627655ARecording apparatus and reproducing apparatus for video signalsHITACHI LTD·Filed 1994·Granted May 6, 1997·137 cites·20 claims
- 0794US4646301ADecoding method and system for doubly-encoded Reed-Solomon codesHITACHI LTD·Filed 1984·Granted Feb 24, 1987·46 cites·11 claims
- 0893US5343455ADigital signal overlapped or joined recording method and apparatusHITACHI LTD·Filed 1991·Granted Aug 30, 1994·70 cites·18 claims
- 0991US6674858B1Receiving device, recording and reproducing device and receiving/recording-reproducing system for digital broadcast signalHITACHI LTD·Filed 1998·Granted Jan 6, 2004·134 cites·5 claims
- 1090US6631505B2Simulation circuit for MOS transistor, simulation testing method, netlist of simulation circuit and storage medium storing sameNEC ELECTRONICS CORP·Filed 2001·Granted Oct 7, 2003·66 cites·12 claims
- 1189US7956423B2Semiconductor device with trench gate and method of manufacturing the sameRENESAS ELECTRONICS CORP·Filed 2009·Granted Jun 7, 2011·16 cites·20 claims
- 1289US5878188AApparatus for recording and reproducing temporally compressed digital information signalHITACHI LTD·Filed 1994·Granted Mar 2, 1999·32 cites·11 claims
- 1389US4677622AError correction method and systemHITACHI LTD·Filed 1984·Granted Jun 30, 1987·33 cites·5 claims
- 1489US4617599APCM signal recording/reproducing apparatusHITACHI LTD·Filed 1984·Granted Oct 14, 1986·33 cites·10 claims
- 1588US5699370AInformation recording and reproduction apparatus to be controlled by temporal informationHITACHI LTD·Filed 1995·Granted Dec 16, 1997·49 cites·15 claims
- 1688US4101841AGain control circuitHITACHI LTD·Filed 1977·Granted Jul 18, 1978·33 cites·3 claims
- 1787US4942487AApparatus for recording/reproducing a digital signal at variable speedsHITACHI LTD·Filed 1988·Granted Jul 17, 1990·35 cites·3 claims
- 1887US4492997AReproducing and amplifying circuit for magnetoresistive headHITACHI LTD·Filed 1981·Granted Jan 8, 1985·29 cites·12 claims
- 1986US5528574ADisk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocityHITACHI LTD·Filed 1994·Granted Jun 18, 1996·38 cites·8 claims
- 2085US7779256B2Reproducing apparatus, recording apparatus and display apparatusHITACHI LTD·Filed 2008·Granted Aug 17, 2010·3 cites·3 claims
- 2185US6535614B1Method and apparatus for recording and reproducing electronic watermark information, and recording mediumHITACHI LTD·Filed 1998·Granted Mar 18, 2003·66 cites·2 claims
- 2285US5825969AInformation management apparatus for inhibiting reproduction in a video cassette recorderHITACHI LTD·Filed 1997·Granted Oct 20, 1998·30 cites·17 claims
- 2385US4961204APCM signal generating/reproducing apparatusHITACHI LTD·Filed 1989·Granted Oct 2, 1990·50 cites·24 claims
- 2484US6778757B1Data recording/reproduction apparatus and methodHITACHI LTD·Filed 1999·Granted Aug 17, 2004·34 cites·5 claims
- 2584US6404781B1Data transmission method for embedded data, data transmitting and reproducing apparatuses and information recording medium thereforHITACHI LTD·Filed 1998·Granted Jun 11, 2002·59 cites·14 claims
- 2684US4628373ARotating head type magnetic record/reproduce apparatusHITACHI LTD·Filed 1984·Granted Dec 9, 1986·26 cites·2 claims
- 2784US4622600ARotary-head type PCM data recording/reproducing method and apparatus with a redundancy-reduced control data formatHITACHI LTD·Filed 1984·Granted Nov 11, 1986·25 cites·9 claims
- 2884US4497055AData error concealing method and apparatusHITACHI LTD·Filed 1982·Granted Jan 29, 1985·26 cites·7 claims
- 2982US6578149B1Method for reproducing data, apparatus for reproducing data, method for coding data, method for recording data, apparatus for recording and reproducing data, method for authentication, semiconductor chip, reproducing apparatus, recording apparatus and data processing apparatusHITACHI LTD·Filed 1999·Granted Jun 10, 2003·45 cites·38 claims
- 3082US4716567AMethod of transmitting digital data in which error detection codes are dispersed using alternate delay timesHITACHI LTD·Filed 1986·Granted Dec 29, 1987·41 cites·2 claims
- 3182US4685004ARotary head type PCM recording and reproduction method and systemHITACHI LTD·Filed 1985·Granted Aug 4, 1987·28 cites·9 claims
- 3282US4646170AMethod and apparatus for recording and reproducing a digital signal with a stationary headHITACHI LTD·Filed 1985·Granted Feb 24, 1987·28 cites·9 claims
- 3382US4539605APCM Tape recording and reproducing apparatus having a dropout-immune data recording formatHITACHI LTD·Filed 1982·Granted Sep 3, 1985·24 cites·3 claims
- 3481US5719943ADigital information signal transmitting/receiving method and systemHITACHI LTD·Filed 1995·Granted Feb 17, 1998·70 cites·27 claims
- 3581US4282551APCM Recording and reproducing apparatusHITACHI LTD·Filed 1980·Granted Aug 4, 1981·23 cites·7 claims
- 3680US7087396B2Monoclonal antibody and method and kit for immunoassay of soluble human ST2MEDICAL BIOLOG LAB CO LTD·Filed 2002·Granted Aug 8, 2006·69 cites·17 claims
- 3780US6519351B2Method and apparatus for recording and reproducing electronic watermark information, and recording mediumHITACHI LTD·Filed 2001·Granted Feb 11, 2003·20 cites·7 claims
- 3880US5917857ADigital modulation apparatus, a digital modulation method, and a recording medium thereforMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Jun 29, 1999·35 cites·6 claims
- 3979US7197232B2Digital information recording-reproducing apparatusHITACHI LTD·Filed 2004·Granted Mar 27, 2007·8 cites·8 claims
- 4079US4649542ADigital signal transmission method providing high error correction capabilityHITACHI LTD·Filed 1984·Granted Mar 10, 1987·21 cites·6 claims
- 4179US4580255AServo circuit for a signal reproducing apparatusHITACHI LTD·Filed 1983·Granted Apr 1, 1986·21 cites·12 claims
- 4279US4218659AAmplifier circuit for a hall-effect headHITACHI LTD·Filed 1979·Granted Aug 19, 1980·16 cites·8 claims
- 4378US4562549ADigital player using a pulse width detectorHITACHI LTD·Filed 1982·Granted Dec 31, 1985·34 cites·25 claims
- 4477US7267642B2Automatic tool changing device and working machineTOSHIBA MACHINE CO LTD·Filed 2006·Granted Sep 11, 2007·8 cites·6 claims
- 4577US4843493ARotary head type magnetic recording and reproducing apparatus and method of producing tracking control signals thereforHITACHI LTD·Filed 1986·Granted Jun 27, 1989·24 cites·25 claims
- 4677US4134078AGain control circuitHITACHI LTD·Filed 1977·Granted Jan 9, 1979·19 cites·4 claims
- 4776US7675111B2Semiconductor device including diffusion layer formed in drift region disposed apart from base regionNEC ELECTRONICS CORP·Filed 2006·Granted Mar 9, 2010·6 cites·3 claims
- 4876US4670796ARotary head type PCM recorderHITACHI LTD·Filed 1984·Granted Jun 2, 1987·18 cites·7 claims
- 4975US9845828B2Guide mechanism of machine tool and machine toolTOSHIBA MACHINE CO LTD·Filed 2015·Granted Dec 19, 2017·2 cites·9 claims
- 5075US7043645B2Reproducing apparatus, recording apparatus and display apparatusHITACHI LTD·Filed 2003·Granted May 9, 2006·6 cites·26 claims
Showing the top 50 of 142 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →