Inventor · disambiguated record
Koji Hirata
Also filed as: HIRATA KOJI · SASAKI SHIGENORI
281 granted patents·74 pending applications·2,165 citations·filing 1986–2025
99Inventor score
Top patents by PatentIndex Score
355 records- 0198US11846776B2Head-up display apparatusMAXELL LTD·Filed 2022·Granted Dec 19, 2023·7 cites·55 claims
- 0298US8662678B2Solid-state light source deviceHIRATA KOJI·Filed 2010·Granted Mar 4, 2014·33 cites·13 claims
- 0396US11586040B2In-vehicle information display system and information display apparatusMAXELL LTD·Filed 2019·Granted Feb 21, 2023·9 cites·15 claims
- 0496US6573950B1Optical projection apparatus, transmission type screen, and projection type image display apparatusHITACHI LTD·Filed 2000·Granted Jun 3, 2003·46 cites·5 claims
- 0595US12038580B2In-vehicle information display system and information display apparatusMAXELL LTD·Filed 2022·Granted Jul 16, 2024·2 cites·20 claims
- 0695US11828938B2Information display apparatusMAXELL LTD·Filed 2021·Granted Nov 28, 2023·2 cites·13 claims
- 0795US8182097B2Projection type image display apparatusHIRATA KOJI·Filed 2011·Granted May 22, 2012·10 cites·14 claims
- 0895US7914153B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Mar 29, 2011·11 cites·4 claims
- 0995US7473034B2Hydrodynamic bearing device, motor, and disk driving apparatusPANASONIC CORP·Filed 2006·Granted Jan 6, 2009·20 cites·18 claims
- 1095US5590943ARear projection type image display apparatus and transmission type screen used thereinHITACHI LTD·Filed 1993·Granted Jan 7, 1997·49 cites·54 claims
- 1195US5513037ARear-projection screen and a rear projection image display employing the rear-projection screenHITACHI LTD·Filed 1994·Granted Apr 30, 1996·47 cites·6 claims
- 1295US5066099ARear projection screen and method of producing the sameHITACHI LTD·Filed 1990·Granted Nov 19, 1991·136 cites·24 claims
- 1394US7255444B2Optical unit and projection-type image display apparatus using the sameHITACHI LTD·Filed 2005·Granted Aug 14, 2007·22 cites·26 claims
- 1494US7245429B2Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheetHITACHI LTD·Filed 2006·Granted Jul 17, 2007·20 cites·5 claims
- 1594US5613748ARear projection type image display apparatus and transmission type screen used thereinHITACHI LTD·Filed 1996·Granted Mar 25, 1997·48 cites·19 claims
- 1693US8313199B2Projection display system including lens group and reflecting mirrorHIRATA KOJI·Filed 2007·Granted Nov 20, 2012·16 cites·18 claims
- 1793US8020999B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Sep 20, 2011·10 cites·4 claims
- 1893US8002418B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Aug 23, 2011·10 cites·13 claims
- 1993US8002417B2Projection-type image display apparatusHITACHI LTD·Filed 2010·Granted Aug 23, 2011·11 cites·13 claims
- 2093US7850313B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Dec 14, 2010·8 cites·6 claims
- 2193US7535648B2Projection type image displayHITACHI LTD·Filed 2006·Granted May 19, 2009·20 cites·9 claims
- 2293US6396641B2Projection lens system and projection image display apparatus using the sameHITACHI LTD·Filed 2001·Granted May 28, 2002·41 cites·7 claims
- 2393US6299313B1Projection display apparatus and projection lens device for use thereinHITACHI LTD·Filed 2000·Granted Oct 9, 2001·52 cites·11 claims
- 2493US5485308ARear-projection type image display apparatus and rear-projection type screenHITACHI LTD·Filed 1995·Granted Jan 16, 1996·70 cites·23 claims
- 2592US11016380B2Projection video display apparatusMAXELL LTD·Filed 2020·Granted May 25, 2021·3 cites·7 claims
- 2692US10890763B2Information display apparatusMAXELL LTD·Filed 2017·Granted Jan 12, 2021·8 cites·6 claims
- 2792US9459331B2RF coil and magnetic resonance imaging deviceOTAKE YOSUKE·Filed 2012·Granted Oct 4, 2016·13 cites·16 claims
- 2892US9256060B2Pinhole array and display device using sameHITACHI MAXELL·Filed 2013·Granted Feb 9, 2016·14 cites·10 claims
- 2992US6560041B2Projection lens apparatus and projection type image display apparatusHITACHI LTD·Filed 2001·Granted May 6, 2003·30 cites·17 claims
- 3092US5400114ARear-projection screen and a rear projection image display employing the rear-projection screenHITACHI LTD·Filed 1992·Granted Mar 21, 1995·36 cites·37 claims
- 3191US11487115B2Head-up display apparatusMAXELL LTD·Filed 2017·Granted Nov 1, 2022·6 cites·17 claims
- 3291US10994613B2Information display deviceMAXELL LTD·Filed 2018·Granted May 4, 2021·8 cites·10 claims
- 3391US10829036B2Road sign projector and vehicle lampMAXELL LTD·Filed 2019·Granted Nov 10, 2020·6 cites·13 claims
- 3491US10100995B2Vehicular lighting apparatusMAXELL LTD·Filed 2014·Granted Oct 16, 2018·10 cites·8 claims
- 3591US8408717B2Projection type image display apparatusHIRATA KOJI·Filed 2012·Granted Apr 2, 2013·8 cites·13 claims
- 3691US7766488B2Projection type image display apparatusHITACHI LTD·Filed 2007·Granted Aug 3, 2010·15 cites·17 claims
- 3791US2025349270A1Information display apparatusMAXELL LTD·Filed 2025·Application pending·0 cites
- 3890US10670864B2Information display deviceMAXELL LTD·Filed 2015·Granted Jun 2, 2020·7 cites·20 claims
- 3990US8193810B2MRI apparatus with RF surface coil having at least three resonance frequenciesOTAKE YOSUKE·Filed 2008·Granted Jun 5, 2012·21 cites·13 claims
- 4090US7857462B2Projection optical unit, projection-type image displaying apparatus and projection-type image displaying systemHITACHI LTD·Filed 2010·Granted Dec 28, 2010·11 cites·4 claims
- 4190US7274157B2Lamp operation controller and controlling method of lamp operationHITACHI LTD·Filed 2005·Granted Sep 25, 2007·23 cites·8 claims
- 4290US6894729B2Optical projection apparatus, transmission type screen, and projection type image display apparatusHITACHI LTD·Filed 2003·Granted May 17, 2005·21 cites·14 claims
- 4390US2025298244A1Projection optical system and head-up display device and vehicle including projection optical system and head-up display deviceMAXELL LTD·Filed 2025·Application pending·0 cites
- 4489US11921287B2Information display apparatusMAXELL LTD·Filed 2018·Granted Mar 5, 2024·4 cites·4 claims
- 4589US11119315B2Information display apparatusMAXELL LTD·Filed 2015·Granted Sep 14, 2021·6 cites·14 claims
- 4689US8690349B2Oblique projection optical system and projection type display apparatus using the sameHITACHI CONSUMER ELECTRONICS·Filed 2013·Granted Apr 8, 2014·9 cites·15 claims
- 4789US8013487B2Hydrodynamic bearing device, and spindle motor and information apparatus equipped with samePANASONIC CORP·Filed 2009·Granted Sep 6, 2011·13 cites·21 claims
- 4889US7733092B2Magnetic field coil and magnetic resonance imaging apparatusHITACHI LTD·Filed 2008·Granted Jun 8, 2010·18 cites·17 claims
- 4989US7670009B2Projection-type image display apparatusHITACHI LTD·Filed 2009·Granted Mar 2, 2010·10 cites·5 claims
- 5089US7459023B2Method for producing semiconductor crystalTOYODA GOSEI KK·Filed 2006·Granted Dec 2, 2008·7 cites·20 claims
Showing the top 50 of 355 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →