Inventor · disambiguated record
Makoto Okai
Also filed as: OKAI MAKOTO
35 granted patents·19 pending applications·1,034 citations·filing 1988–2019
98Inventor score
Top patents by PatentIndex Score
54 records- 0197US6639925B2Optical information processing equipment and semiconductor light emitting device suitable thereforHITACHI INC·Filed 2001·Granted Oct 28, 2003·285 cites·9 claims
- 0296US7196463B2Emissive flat panel display having electron sources with high current density and low electric field strengthHITACHI DISPLAYS LTD·Filed 2004·Granted Mar 27, 2007·82 cites·2 claims
- 0395US4885753ASemiconductor laser device of variable wavelength typeHITACHI LTD·Filed 1988·Granted Dec 5, 1989·69 cites·22 claims
- 0493US8410474B2Graphene grown substrate and electronic/photonic integrated circuits using sameOKAI MAKOTO·Filed 2011·Granted Apr 2, 2013·18 cites·14 claims
- 0592US5119393ASemiconductor laser device capable of controlling wavelength shiftHITACHI LTD·Filed 1990·Granted Jun 2, 1992·81 cites·21 claims
- 0691US7976950B2Transparent conductive film and electronic device including sameHITACHI LTD·Filed 2010·Granted Jul 12, 2011·16 cites·12 claims
- 0791US4873691AWavelength-tunable semiconductor laserHITACHI LTD·Filed 1988·Granted Oct 10, 1989·46 cites·21 claims
- 0888US4894835ASurface emitting type semiconductor laserHITACHI LTD·Filed 1988·Granted Jan 16, 1990·40 cites·12 claims
- 0987US8471237B2Circuit board including a graphene film having contact region covering a recessed region and a patterned metal film covering the contact region and in direct electrical contact therewith, and device including sameOKAI MAKOTO·Filed 2011·Granted Jun 25, 2013·9 cites·9 claims
- 1086US5177758ASemiconductor laser device with plural active layers and changing optical propertiesHITACHI LTD·Filed 1991·Granted Jan 5, 1993·54 cites·36 claims
- 1184US6914381B2Flat panel display with nanotubesHITACHI LTD·Filed 2002·Granted Jul 5, 2005·20 cites·19 claims
- 1284US4905060ALight emitting device with disordered regionHITACHI LTD·Filed 1988·Granted Feb 27, 1990·45 cites·17 claims
- 1383US5340637AOptical device diffraction gratings and a photomask for use in the sameHITACHI LTD·Filed 1992·Granted Aug 23, 1994·67 cites·11 claims
- 1482US8181268B2Scanning probe microscope and method of observing sample using the sameNAKATA TOSHIHIKO·Filed 2008·Granted May 15, 2012·6 cites·20 claims
- 1581US8476739B2Graphene grown substrate and electronic/photonic integrated circuits using sameOKAI MAKOTO·Filed 2009·Granted Jul 2, 2013·9 cites·12 claims
- 1679US8407811B2Scanning probe microscope and method of observing sample using the sameNAKATA TOSHIHIKO·Filed 2010·Granted Mar 26, 2013·4 cites·16 claims
- 1779US8089428B2Flat panel display apparatusYAGUCHI TOMIO·Filed 2006·Granted Jan 3, 2012·5 cites·8 claims
- 1878US8438660B2Micro contact proberHIROOKA MOTOYUKI·Filed 2010·Granted May 7, 2013·6 cites·7 claims
- 1977US6542526B1Optical information processor and semiconductor light emitting device suitable for the sameHITACHI LTD·Filed 1997·Granted Apr 1, 2003·40 cites·4 claims
- 2076US6198863B1Optical filtersBRITISH TELECOMM·Filed 1996·Granted Mar 6, 2001·42 cites·18 claims
- 2172US8635710B2Scanning probe microscope and method of observing sample using the sameNAKATA TOSHIHIKO·Filed 2012·Granted Jan 21, 2014·2 cites·12 claims
- 2271US8507893B2Electronic device, light-receiving and light-emitting device, electronic integrated circuit and optical integrated circuit using the devicesOKAI MAKOTO·Filed 2009·Granted Aug 13, 2013·3 cites·16 claims
- 2371US5699378AOptical comb filters used with waveguide, laser and manufacturing method of sameBRITISH TELECOMM·Filed 1996·Granted Dec 16, 1997·34 cites·14 claims
- 2467US7732764B2Field emission electron gun and electron beam applied device using the sameHITACHI LTD·Filed 2007·Granted Jun 8, 2010·1 cites·10 claims
- 2564US7116291B1Image display and method of driving image displayHITACHI LTD·Filed 2000·Granted Oct 3, 2006·8 cites·14 claims
- 2663US9997771B2Negative electrode material for lithium ion secondary battery and manufacturing method of the same, negative electrode for lithium ion secondary battery and manufacturing method of the same, and lithium ion secondary batteryHITACHI LTD·Filed 2013·Granted Jun 12, 2018·0 cites·15 claims
- 2763US7259511B2Flat panel display device with surfaces of cathodes and control electrodes lying in the same flat planeHITACHI DISPLAYS LTD·Filed 2004·Granted Aug 21, 2007·5 cites·6 claims
- 2862US8278658B2Electrically connected graphene-metal electrode device, and electronic device, electronic integrated circuit and electro-optical integrated circuit using sameOKAI MAKOTO·Filed 2010·Granted Oct 2, 2012·2 cites·7 claims
- 2959US10793938B2Method for producing boron nitride nanotube-reinforced aluminum composite castingHITACHI METALS LTD·Filed 2019·Granted Oct 6, 2020·0 cites·6 claims
- 3058US2021316990A1Manufacturing method of boron nitride nanomaterial and boron nitride nanomaterial, manufacturing method of composite material and composite material, and method of purifying boron nitride nanomaterialHITACHI METALS LTD·Filed 2019·Application pending·0 cites
- 3151US5572616AWaveguide deviceHITACHI LTD·Filed 1995·Granted Nov 5, 1996·12 cites·15 claims
- 3250US2017309913A1Negative Electrode Active Material for Lithium Ion Secondary Battery and Lithium Ion Secondary BatteryHITACHI LTD·Filed 2014·Application pending·0 cites
- 3350US2008315747A1Electron emitting element, electron gun, and electron beam applied equipment using the sameHITACHI HIGH TECH CORP·Filed 2008·Application pending·0 cites
- 3449US2015357632A1Negative electrode active material for lithium secondary batteries, and lithium secondary batteryHITACHI LTD·Filed 2013·Application pending·0 cites
- 3549US2019316233A1Composite of aluminum and boron nitride nanotubes and method for manufacturing sameHITACHI METALS LTD·Filed 2019·Application pending·0 cites
- 3648US6818941B1Thin film electron emitter, display device using the same and applied machineHITACHI LTD·Filed 1999·Granted Nov 16, 2004·7 cites·46 claims
- 3747US6570321B1Thin-film electron source, process for manufacturing thin-film electron source, and displayHITACHI LTD·Filed 1999·Granted May 27, 2003·7 cites·33 claims
- 3846US2006197435A1Emissive flat panel display deviceOKAI MAKOTO·Filed 2006·Application pending·0 cites
- 3946US2006049743A1Flat panel displayOKAI MAKOTO·Filed 2005·Application pending·0 cites
- 4046US2007018563A1Self-luminous flat-panel displayOKAI MAKOTO·Filed 2006·Application pending·0 cites
- 4145US5666455AWaveguide deviceHITACHI LTD·Filed 1996·Granted Sep 9, 1997·9 cites·3 claims
- 4245US2007200485A1Image display deviceYAGUCHI TOMIO·Filed 2006·Application pending·0 cites
- 4344US2006208620A1Image display device and production method for sameMUNEYOSHI TAKAHIKO·Filed 2006·Application pending·0 cites
- 4441US7400083B2Flat panel display device including electron beam sources and control electrodesHITACHI DISPLAYS LTD·Filed 2004·Granted Jul 15, 2008·0 cites·3 claims
- 4541US7285901B2Display device having a connecting portion between cathode line and electron sourceHITACHI DISPLAYS LTD·Filed 2004·Granted Oct 23, 2007·0 cites·15 claims
- 4641US2005052116A1Flat panel backlight and liquid crystal display device using the sameFiled 2004·Application pending·0 cites
- 4741US2018159124A1Negative electrode active material for lithium ion secondary batteries, and lithium ion secondary batteryHITACHI LTD·Filed 2016·Application pending·0 cites
- 4841US2009243637A1Measuring apparatus having nanotube probeHITACHI HIGH TECH CORP·Filed 2009·Application pending·0 cites
- 4941US2010043108A1Probe for scanning probe microscopeHITACHI CONSTRUCTION MACHINERY·Filed 2008·Application pending·0 cites
- 5040US2004251813A1Emissive flat panel display deviceFiled 2004·Application pending·0 cites
Showing the top 50 of 54 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →