Inventor · disambiguated record
Norio Ohta
Also filed as: OHTA NORIO
93 granted patents·3 pending applications·1,463 citations·filing 1979–2003
99Inventor score
Files withHITACHI LTD37HITACHI MAXELL29TOYODA MACHINE WORKS LTD18JAPAN BROADCASTING CORP3KAWASAKI STEEL CO3
Top patents by PatentIndex Score
96 records- 0195US5959943AInformation recording medium with clock information thereinHITACHI LTD·Filed 1997·Granted Sep 28, 1999·69 cites·2 claims
- 0294US4570387ACenterless grinding machineTOYODA MACHINE WORKS LTD·Filed 1984·Granted Feb 18, 1986·45 cites·3 claims
- 0392US6893746B1Magnetic recording medium with high thermal stability, method for producing the same, and magnetic recording apparatusHITACHI MAXELL·Filed 2000·Granted May 17, 2005·43 cites·37 claims
- 0492US6101153AMagnetic head capable of generating multi-stepped external magnetic fields for magneto-optical recording deviceHITACHI MAXELL·Filed 1998·Granted Aug 8, 2000·62 cites·7 claims
- 0591US5062091AMagneto-optical recording method and apparatus capable of overwriting data using a radiation beamHITACHI LTD·Filed 1989·Granted Oct 29, 1991·44 cites·14 claims
- 0690US4836774AMethod and apparatus for heating a strip of metallic material in a continuous annealing furnaceMITSUBISHI HEAVY IND LTD·Filed 1987·Granted Jun 6, 1989·25 cites·5 claims
- 0787US4923396AMethod and apparatus for heating a strip of metallic material in a continuous annealing furnaceMITSUBISHI HEAVY IND LTD·Filed 1989·Granted May 8, 1990·20 cites·3 claims
- 0887US4817053AApparatus for storing and retrieving information using an electron beamHITACHI LTD·Filed 1987·Granted Mar 28, 1989·35 cites·23 claims
- 0986US4581579AOptical magnetic-field measuring apparatus having improved temperature characteristicsHITACHI LTD·Filed 1983·Granted Apr 8, 1986·43 cites·8 claims
- 1084US4604577ATemperature-compensated magnetic field measuring instrumentHITACHI LTD·Filed 1983·Granted Aug 5, 1986·39 cites·23 claims
- 1183US6628574B1Reproducing method and reproducing apparatus using plural light beam powers for transferring a magnetic domainHITACHI MAXELL·Filed 1999·Granted Sep 30, 2003·45 cites·13 claims
- 1283US4788672AMethod and apparatus for controlling renewal of data in optical disc memoryHITACHI LTD·Filed 1986·Granted Nov 29, 1988·26 cites·23 claims
- 1382US4490946AGrinding wheel feeder in grinding machinesTOYODA MACHINE WORKS LTD·Filed 1982·Granted Jan 1, 1985·21 cites·3 claims
- 1480US4709509ANumerically controlled grinding machineTOYODA MACHINE WORKS LTD·Filed 1986·Granted Dec 1, 1987·28 cites·4 claims
- 1579US6693854B2Reproducing method and reproducing apparatus for magneto-optical recording mediumHITACHI MAXELL·Filed 2003·Granted Feb 17, 2004·11 cites·32 claims
- 1679US5319507ARecording/reproducing system using a flexible magnetic diskHITACHI MAXELL·Filed 1992·Granted Jun 7, 1994·29 cites·10 claims
- 1779US5123007AMethod for recording, reproducing and erasing information and thin film for recording informationHITACHI LTD·Filed 1990·Granted Jun 16, 1992·29 cites·19 claims
- 1878US6246640B1Magneto-optical recording medium capable of recording multiple value signalsHITACHI MAXELL·Filed 1998·Granted Jun 12, 2001·25 cites·7 claims
- 1978US5672460AMethod for forming conductive or insulating layersJAPAN BROADCASTING CORP·Filed 1995·Granted Sep 30, 1997·26 cites·9 claims
- 2077US6633514B1Magneto-optical reproducing method using a plural of different reproducing beamsHITACHI MAXELL·Filed 1999·Granted Oct 14, 2003·25 cites·10 claims
- 2177US5170383AMagneto-optical data recording systemHITACHI LTD·Filed 1989·Granted Dec 8, 1992·13 cites·23 claims
- 2276US5296995AMethod of magnetically recording and reading data, magnetic recording medium, its production method and magnetic recording apparatusHITACHI LTD·Filed 1993·Granted Mar 22, 1994·58 cites·23 claims
- 2375US5270987AMagneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium thereforHITACHI LTD·Filed 1990·Granted Dec 14, 1993·22 cites·53 claims
- 2475US4967515ANumerically controlled grinding machineTOYODA MACHINE WORKS LTD·Filed 1989·Granted Nov 6, 1990·35 cites·5 claims
- 2573US6061307AMagneto-optical recording medium having a plurality of magnetic layersHITACHI MAXELL·Filed 1995·Granted May 9, 2000·21 cites·67 claims
- 2669US5783320AMagneto-optical recording medium and process for producing the sameHITACHI MAXELL·Filed 1997·Granted Jul 21, 1998·18 cites·27 claims
- 2769US5257256ARecording waveform for mark-length modulation optical recordingHITACHI LTD·Filed 1991·Granted Oct 26, 1993·18 cites·22 claims
- 2869US4773187ANumerically controlled grinding machineTOYODA MACHINE WORKS LTD·Filed 1987·Granted Sep 27, 1988·27 cites·4 claims
- 2968US6424601B1Magneto-optical recording media having an auxiliary magnetic layerHITACHI MAXELL·Filed 1997·Granted Jul 23, 2002·22 cites·45 claims
- 3068US6339583B1Cartridge for information-recording media having deformable elastic member on shutterHITACHI MAXELL·Filed 1998·Granted Jan 15, 2002·17 cites·12 claims
- 3166US4481739AGrinding machine with dual turretsTOYODA MACHINE WORKS LTD·Filed 1982·Granted Nov 13, 1984·12 cites·7 claims
- 3266US4476152AMethod for production of magnetic bubble memory deviceHITACHI LTD·Filed 1983·Granted Oct 9, 1984·13 cites·13 claims
- 3365US6388954B1Magneto-optical recording medium having clock-marks on recording layer and apparatus for recording and reproducing sameHITACHI MAXELL·Filed 1999·Granted May 14, 2002·18 cites·11 claims
- 3465US6200673B1Magneto-optical recording mediumHITACHI LTD·Filed 1990·Granted Mar 13, 2001·15 cites·9 claims
- 3565US5923625AMagneto-optical recording medium and method for recording and reproduction thereonHITACHI MAXELL·Filed 1996·Granted Jul 13, 1999·17 cites·23 claims
- 3665US4713154AContinuous annealing and pickling method and apparatus for steel stripsKAWASAKI STEEL CO·Filed 1986·Granted Dec 15, 1987·11 cites·8 claims
- 3764US6671233B1Magneto-optical recording medium and reproduction method thereforHITACHI MAXELL·Filed 2000·Granted Dec 30, 2003·4 cites·14 claims
- 3864US6404705B1Magneto-optical disk apparatus having an adjustment mechanism for setting the position of magnetic headsHITACHI MAXELL·Filed 1998·Granted Jun 11, 2002·15 cites·12 claims
- 3964US5076022AGrinding machine for grinding outer and inner surfacesTOYODA MACHINE WORKS LTD·Filed 1989·Granted Dec 31, 1991·23 cites·4 claims
- 4064US4956946ANumerically controlled grinding machineTOYODA MACHINE WORKS LTD·Filed 1989·Granted Sep 18, 1990·15 cites·11 claims
- 4164US4889757AOptical recording diskHITACHI LTD·Filed 1987·Granted Dec 26, 1989·12 cites·34 claims
- 4263US6556516B1Reproducing method and reproducing apparatus for magneto-optical recording medium using different radiation patternsHITACHI MAXELL·Filed 1997·Granted Apr 29, 2003·13 cites·14 claims
- 4362US7352658B2Method for recording information data to a recording medium by irradiation with a light beam and application of a magnetic fieldHITACHI MAXELL·Filed 2001·Granted Apr 1, 2008·4 cites·17 claims
- 4461US4873793ANumerically controlled machine toolTOYODA MACHINE WORKS LTD·Filed 1987·Granted Oct 17, 1989·22 cites·9 claims
- 4560US6904002B2Magneto-optical reproducing method using a plurality of different reproducing beamsHITACHI MAXELL·Filed 2003·Granted Jun 7, 2005·3 cites·27 claims
- 4660US5637411AMagneto-optical recording medium and process for producing the sameHITACHI MAXELL·Filed 1994·Granted Jun 10, 1997·11 cites·13 claims
- 4759US5914198AMagneto-optical recording medium having dielectric layers with different indices of refractionHITACHI LTD·Filed 1997·Granted Jun 22, 1999·14 cites·2 claims
- 4859US5473581AMagneto-optical data recording system continuously irradiating optical pulsersHITACHI LTD·Filed 1992·Granted Dec 5, 1995·7 cites·15 claims
- 4958US5321672AMethod of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domainsHITACHI LTD·Filed 1990·Granted Jun 14, 1994·11 cites·6 claims
- 5057US5038338ARecording waveform for mark-length modulation optical recordingHITACHI LTD·Filed 1990·Granted Aug 6, 1991·11 cites·10 claims
Showing the top 50 of 96 patent records by PatentIndex Score.
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