Inventor · disambiguated record
Yoshitaka Itoh
Also filed as: ITOH YOSHITAKA · SUZUKI TOSHIMASA
68 granted patents·6 pending applications·1,225 citations·filing 1978–2021
99Inventor score
Top patents by PatentIndex Score
74 records- 0198US10908487B1Light emitting device and projectorSEIKO EPSON CORP·Filed 2020·Granted Feb 2, 2021·4 cites·5 claims
- 0295US7126736B2Illumination device, display device and projectorSEIKO EPSON CORP·Filed 2005·Granted Oct 24, 2006·18 cites·12 claims
- 0394US7119957B2Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2004·Granted Oct 10, 2006·38 cites·8 claims
- 0493US7364305B2ProjectorSEIKO EPSON CORP·Filed 2005·Granted Apr 29, 2008·19 cites·15 claims
- 0593US6513953B1Illumination system and projectorSEIKO EPSON CORP·Filed 2000·Granted Feb 4, 2003·59 cites·22 claims
- 0693US4680048AMethod of preparing doped silica glassSEIKO EPSON CORP·Filed 1985·Granted Jul 14, 1987·58 cites·45 claims
- 0791US6344927B1Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2000·Granted Feb 5, 2002·29 cites·44 claims
- 0891US6147802APolarization luminaire and projection displaySEIKO EPSON CORP·Filed 1995·Granted Nov 14, 2000·79 cites·2 claims
- 0990US6778228B2Projection-type display apparatusSEIKO EPSON CORP·Filed 2002·Granted Aug 17, 2004·40 cites·15 claims
- 1090US6445500B1Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2000·Granted Sep 3, 2002·27 cites·12 claims
- 1190US6411438B1Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2000·Granted Jun 25, 2002·26 cites·19 claims
- 1290US6309073B1ProjectorSEIKO EPSON CORP·Filed 2000·Granted Oct 30, 2001·23 cites·16 claims
- 1390US5626409AProjection-type display apparatusSEIKO EPSON CORP·Filed 1994·Granted May 6, 1997·70 cites·29 claims
- 1489US6108132APolarized light separating/combining optical element, polarized light illuminating apparatus and projection-type display deviceSEIKO EPSON CORP·Filed 1997·Granted Aug 22, 2000·24 cites·12 claims
- 1588US6208451B1Polarization conversion system, illumination system, and projectorSEIKO EPSON CORP·Filed 2000·Granted Mar 27, 2001·36 cites·22 claims
- 1687US6348997B1Polarizing illuminating device and projectorSEIKO EPSON CORP·Filed 2000·Granted Feb 19, 2002·19 cites·44 claims
- 1786US6667834B2Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2002·Granted Dec 23, 2003·17 cites·5 claims
- 1885US11042079B2ProjectorSEIKO EPSON CORP·Filed 2019·Granted Jun 22, 2021·2 cites·26 claims
- 1985US6497485B1Image projection system having uniform brightnessSEIKO EPSON CORP·Filed 2000·Granted Dec 24, 2002·21 cites·5 claims
- 2084US6101040AIllumination optical system and projection-type display apparatusSEIKO EPSON CORP·Filed 1998·Granted Aug 8, 2000·18 cites·20 claims
- 2184US4680046AMethod of preparing preforms for optical fibersSEIKO EPSON CORP·Filed 1985·Granted Jul 14, 1987·33 cites·41 claims
- 2282US7234822B2Light propagation structure and optical display device of optical system, light propagation method of optical system, and display method of optical display deviceSEIKO EPSON CORP·Filed 2004·Granted Jun 26, 2007·16 cites·18 claims
- 2382US6529250B1ProjectorSEIKO EPSON CORP·Filed 1998·Granted Mar 4, 2003·53 cites·22 claims
- 2480US6310723B1Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2000·Granted Oct 30, 2001·10 cites·29 claims
- 2578US6471358B1Lighting device and projectorSEIKO EPSON CORP·Filed 2000·Granted Oct 29, 2002·17 cites·8 claims
- 2678US6109751AProjector and lighting optical system thereforSEIKO EPSON CORP·Filed 1997·Granted Aug 29, 2000·15 cites·36 claims
- 2776US6394607B1Polarized light separation device, method of fabricating the same and projection display apparatus using the polarized light separation deviceSEIKO EPSON CORP·Filed 1997·Granted May 28, 2002·50 cites·36 claims
- 2873US10261403B2Wavelength conversion element, light source apparatus, and projectorSEIKO EPSON CORP·Filed 2018·Granted Apr 16, 2019·1 cites·20 claims
- 2973US6120152AProjection-type display apparatusSEIKO EPSON CORP·Filed 1997·Granted Sep 19, 2000·31 cites·16 claims
- 3073US6042234APolarized light illumination device and projection display deviceSEIKO EPSON CORP·Filed 1999·Granted Mar 28, 2000·45 cites·20 claims
- 3172US6348996B1Polarization illumination device and projectorSEIKO EPSON CORP·Filed 2000·Granted Feb 19, 2002·11 cites·28 claims
- 3272US6154320APolarizing conversion device, polarizing illuminations device, and display apparatus and projector using the devicesSEIKO EPSON CORP·Filed 1999·Granted Nov 28, 2000·35 cites·11 claims
- 3371US7445345B2Optical display device and projection-type display deviceSEIKO EPSON CORP·Filed 2004·Granted Nov 4, 2008·9 cites·19 claims
- 3471US6441710B1Superconducting magnet apparatus and method for magnetizing superconductorAISIN SEIKI·Filed 2000·Granted Aug 27, 2002·10 cites·4 claims
- 3570US7580603B2Illumination device, display device, and projection type display deviceSEIKO EPSON CORP·Filed 2005·Granted Aug 25, 2009·5 cites·19 claims
- 3669US8567956B2ProjectorITOH YOSHITAKA·Filed 2011·Granted Oct 29, 2013·2 cites·17 claims
- 3769US8496335B2Illumination apparatus, projector, and illumination methodITOH YOSHITAKA·Filed 2009·Granted Jul 30, 2013·3 cites·20 claims
- 3869US6341867B1Polarized light illumination device and projectorSEIKO EPSON CORP·Filed 1999·Granted Jan 29, 2002·33 cites·22 claims
- 3968US6109752ALighting device and projectorSEIKO EPSON CORP·Filed 1997·Granted Aug 29, 2000·29 cites·21 claims
- 4067US8616707B2Projector with cooling mechanismMIYAZAWA YASUNAGA·Filed 2011·Granted Dec 31, 2013·2 cites·6 claims
- 4167US6204972B1Illumination optical system and projection-type display apparatusSEIKO EPSON CORP·Filed 2000·Granted Mar 20, 2001·9 cites·4 claims
- 4266US6111490ASuperconducting magnet apparatus and method for magnetizing superconductorAISIN SEIKI·Filed 1997·Granted Aug 29, 2000·16 cites·15 claims
- 4366US4622056AMethod of preparing silica glassSEIKO EPSON CORP·Filed 1986·Granted Nov 11, 1986·17 cites·34 claims
- 4464US8529066B2Projector that switches between polarization statesITOH YOSHITAKA·Filed 2011·Granted Sep 10, 2013·1 cites·15 claims
- 4564US5986809APolarization conversion element, polarization illuminator, display using the same illuminator, and projection type displaySEIKO EPSON CORP·Filed 1997·Granted Nov 16, 1999·24 cites·27 claims
- 4661US11619870B2ProjectorSEIKO EPSON CORP·Filed 2021·Granted Apr 4, 2023·0 cites·5 claims
- 4760US6132047APolarized light illumination device and projectorSEIKO EPSON CORP·Filed 1999·Granted Oct 17, 2000·24 cites·22 claims
- 4860US6036318AProjection displaySEIKO EPSON CORP·Filed 1997·Granted Mar 14, 2000·24 cites·27 claims
- 4959US10877362B2Wavelength conversion element, light source device, and projectorSEIKO EPSON CORP·Filed 2018·Granted Dec 29, 2020·0 cites·15 claims
- 5059US2008218697A1Polarization luminaire and projection displaySEIKO EPSON CORP·Filed 2007·Application pending·0 cites
Showing the top 50 of 74 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →