Inventor · disambiguated record
Hidefumi Sakata
Also filed as: SAKATA HIDEFUMI
52 granted patents·10 pending applications·579 citations·filing 1993–2024
98Inventor score
Top patents by PatentIndex Score
62 records- 0196US7360900B2Illuminating apparatus, image display apparatus, and projectorSEIKO EPSON CORP·Filed 2005·Granted Apr 22, 2008·40 cites·17 claims
- 0295US8678596B2Illumination device and projector with fluorescent plateSAKATA HIDEFUMI·Filed 2011·Granted Mar 25, 2014·26 cites·20 claims
- 0394US6592224B2Optical reflection polarizer and projector comprising the sameSEIKO EPSON CORP·Filed 2001·Granted Jul 15, 2003·47 cites·13 claims
- 0493US11815796B2Light source apparatus and projectorSEIKO EPSON CORP·Filed 2022·Granted Nov 14, 2023·2 cites·19 claims
- 0593US7325932B2Display device, lighting device and projectorSEIKO EPSON CORP·Filed 2006·Granted Feb 5, 2008·17 cites·11 claims
- 0693US7159987B2Display device, lighting device and projectorSEIKO EPSON CORP·Filed 2004·Granted Jan 9, 2007·51 cites·10 claims
- 0791US7287860B2Display device, display method, and projectorSEIKO EPSON CORP·Filed 2004·Granted Oct 30, 2007·46 cites·8 claims
- 0891US7192147B2Lighting system and projectorSEIKO EPSON CORP·Filed 2003·Granted Mar 20, 2007·41 cites·4 claims
- 0990US7293880B2Light source including multiple light emitting devices driven by a control device, and projectorSEIKO EPSON CORP·Filed 2005·Granted Nov 13, 2007·14 cites·5 claims
- 1089US11181814B2Light source device and projectorSEIKO EPSON CORP·Filed 2019·Granted Nov 23, 2021·4 cites·18 claims
- 1189US7270427B2Display device, lighting device and projectorSEIKO EPSON CORP·Filed 2006·Granted Sep 18, 2007·10 cites·4 claims
- 1288US11079666B2Light source device and projectorSEIKO EPSON CORP·Filed 2020·Granted Aug 3, 2021·2 cites·15 claims
- 1388US7034808B2Touch panel and electronic deviceSEIKO EPSON CORP·Filed 2002·Granted Apr 25, 2006·57 cites·16 claims
- 1488US6644832B2Illumination device and manufacturing method therefor, display device, and electronic instrumentSEIKO EPSON CORP·Filed 2001·Granted Nov 11, 2003·57 cites·36 claims
- 1587US7946708B2Display device that projects a virtual image displaySEIKO EPSON CORP·Filed 2008·Granted May 24, 2011·18 cites·6 claims
- 1686US11150548B2Light source apparatus and projectorSEIKO EPSON CORP·Filed 2019·Granted Oct 19, 2021·3 cites·10 claims
- 1786US7088347B2Coordinate input device detecting touch on board associated with liquid crystal display, and electronic device thereforSEIKO EPSON CORP·Filed 2002·Granted Aug 8, 2006·44 cites·11 claims
- 1885US8007141B2Diffraction optical element, lighting device, and projectorSEIKO EPSON CORP·Filed 2008·Granted Aug 30, 2011·9 cites·13 claims
- 1984US6764182B2Light reflective polarizer and projector using the sameSEIKO EPSON CORP·Filed 2003·Granted Jul 20, 2004·17 cites·24 claims
- 2082US11669006B2Light guiding unit, light source apparatus, and projectorSEIKO EPSON CORP·Filed 2021·Granted Jun 6, 2023·1 cites·9 claims
- 2182US10203590B2Illuminator and projectorSEIKO EPSON CORP·Filed 2018·Granted Feb 12, 2019·3 cites·18 claims
- 2280US11022869B2Light source apparatus and projectorSEIKO EPSON CORP·Filed 2019·Granted Jun 1, 2021·3 cites·14 claims
- 2378US10746931B2Light source device and projectorSEIKO EPSON CORP·Filed 2019·Granted Aug 18, 2020·1 cites·11 claims
- 2478US9918055B2Polarization converting element, light source device, lighting device, and projectorSEIKO EPSON CORP·Filed 2016·Granted Mar 13, 2018·3 cites·13 claims
- 2577US9323045B2Illumination device and projectorSEIKO EPSON CORP·Filed 2014·Granted Apr 26, 2016·2 cites·21 claims
- 2675US8506128B2Light source device, illumination system, and projectorSAKATA HIDEFUMI·Filed 2010·Granted Aug 13, 2013·3 cites·11 claims
- 2773US7484850B2Illuminating device and projectorSEIKO EPSON CORP·Filed 2004·Granted Feb 3, 2009·10 cites·11 claims
- 2872US9563109B2Light source device with wavelength conversion element and projector including the sameSEIKO EPSON CORP·Filed 2013·Granted Feb 7, 2017·2 cites·21 claims
- 2971US7809209B2Image display device, and control method for the sameSEIKO EPSON CORP·Filed 2006·Granted Oct 5, 2010·2 cites·7 claims
- 3070US11187970B2Light source apparatus having side by side light guide and wavelength converterSEIKO EPSON CORP·Filed 2019·Granted Nov 30, 2021·1 cites·16 claims
- 3169US11101415B2Light source apparatus and projectorSEIKO EPSON CORP·Filed 2019·Granted Aug 24, 2021·1 cites·20 claims
- 3268US9423680B2Light source apparatus that irradiates a phosphor layer with excitation light and projectorSEIKO EPSON CORP·Filed 2014·Granted Aug 23, 2016·2 cites·20 claims
- 3368US7972009B2Projector and projection unitSEIKO EPSON CORP·Filed 2008·Granted Jul 5, 2011·4 cites·10 claims
- 3466US9860493B2Illumination device and projectorSEIKO EPSON CORP·Filed 2016·Granted Jan 2, 2018·1 cites·16 claims
- 3564US8132918B2Illumination apparatus, projector, and polarization conversion elementSAKATA HIDEFUMI·Filed 2009·Granted Mar 13, 2012·2 cites·11 claims
- 3664US5436876AOptical head and optical memory deviceSEIKO EPSON CORP·Filed 1993·Granted Jul 25, 1995·15 cites·7 claims
- 3763US12461436B2ProjectorSEIKO EPSON CORP·Filed 2023·Granted Nov 4, 2025·0 cites·18 claims
- 3862US7576313B2Light source device and image display deviceSEIKO EPSON CORP·Filed 2005·Granted Aug 18, 2009·1 cites·6 claims
- 3959US11175574B2Light source apparatus and projectorSEIKO EPSON CORP·Filed 2019·Granted Nov 16, 2021·0 cites·14 claims
- 4059US5673241AFocus detection mechanism and optical head and optical storage device that use itSEIKO EPSON CORP·Filed 1996·Granted Sep 30, 1997·14 cites·37 claims
- 4158US2024288759A1ProjectorSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 4258US2023163256A1Light source device and projectorSEIKO EPSON CORP·Filed 2022·Application pending·0 cites
- 4356US10921698B2Light source device, projector, and phosphor rodSEIKO EPSON CORP·Filed 2020·Granted Feb 16, 2021·0 cites·13 claims
- 4454US12393111B2Light source device and projectorSEIKO EPSON CORP·Filed 2022·Granted Aug 19, 2025·0 cites·11 claims
- 4554US2024288761A1ProjectorSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 4654US2024288760A1ProjectorSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 4754US2007121310A1Lighting system and projectorSEIKO EPSON CORP·Filed 2007·Application pending·0 cites
- 4853US10838292B2Light source apparatus, illuminator, and projectorSEIKO EPSON CORP·Filed 2018·Granted Nov 17, 2020·0 cites·20 claims
- 4953US8308309B2Lighting device and projectorSAKATA HIDEFUMI·Filed 2009·Granted Nov 13, 2012·0 cites·8 claims
- 5052US10061105B2Projection system, projector, and conversion lens for projectorSEIKO EPSON CORP·Filed 2017·Granted Aug 28, 2018·0 cites·19 claims
Showing the top 50 of 62 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →