Inventor · disambiguated record
Koichi Akiyama
Also filed as: AKIYAMA KOICHI
209 granted patents·33 pending applications·1,176 citations·filing 1987–2025
99Inventor score
Files withSEIKO EPSON CORP154MITSUBISHI ELECTRIC CORP26AKIYAMA KOICHI16KOWA CO12TAKEDA CHEMICAL INDUSTRIES LTD8
Top patents by PatentIndex Score
242 records- 0198US10915014B1Illumination optical device and projectorSEIKO EPSON CORP·Filed 2020·Granted Feb 9, 2021·10 cites·8 claims
- 0297US8585208B2Light source device and projectorAKIYAMA KOICHI·Filed 2012·Granted Nov 19, 2013·23 cites·18 claims
- 0396US11287720B2Semiconductor optical modulatorMITSUBISHI ELECTRIC CORP·Filed 2018·Granted Mar 29, 2022·14 cites·13 claims
- 0495US8596795B2ProjectorAKIYAMA KOICHI·Filed 2011·Granted Dec 3, 2013·17 cites·14 claims
- 0595US7288899B2Light source, projector, and method of driving arc tubeSEIKO EPSON CORP·Filed 2005·Granted Oct 30, 2007·26 cites·11 claims
- 0694US11327392B2Light source device and projector in which wave plates are downsizedSEIKO EPSON CORP·Filed 2020·Granted May 10, 2022·3 cites·20 claims
- 0794US9946143B1Light source apparatus and projectorSEIKO EPSON CORP·Filed 2017·Granted Apr 17, 2018·8 cites·17 claims
- 0894US9429831B2Lighting device and projectorSEIKO EPSON CORP·Filed 2014·Granted Aug 30, 2016·12 cites·12 claims
- 0993US9942528B2Wavelength conversion element, illumination device, and projectorSEIKO EPSON CORP·Filed 2017·Granted Apr 10, 2018·7 cites·15 claims
- 1093US9500941B2Illumination device and projectorSEIKO EPSON CORP·Filed 2015·Granted Nov 22, 2016·13 cites·20 claims
- 1193US8628199B2Light source device with a plurality of light sources and a collimating lensAKIYAMA KOICHI·Filed 2011·Granted Jan 14, 2014·18 cites·19 claims
- 1293US7213927B2Projector with electrooptical modulatorSEIKO EPSON CORP·Filed 2005·Granted May 8, 2007·21 cites·13 claims
- 1392US11681211B2Light source apparatus and projectorSEIKO EPSON CORP·Filed 2022·Granted Jun 20, 2023·2 cites·8 claims
- 1491US10343352B2Fiber-reinforced resin material, molded article, method and device for manufacturing fiber-reinforced resin material, and fiber bundle group inspection deviceMITSUBISHI CHEM CORP·Filed 2016·Granted Jul 9, 2019·4 cites·4 claims
- 1591US9010938B2Projector with multiple different types of illumination devicesAKIYAMA KOICHI·Filed 2011·Granted Apr 21, 2015·13 cites·8 claims
- 1691US8998421B2Projector having polarization conversionSEIKO EPSON CORP·Filed 2013·Granted Apr 7, 2015·14 cites·12 claims
- 1791US7185984B2Illumination optical system and projector comprising the sameSEIKO EPSON CORP·Filed 2001·Granted Mar 6, 2007·46 cites·15 claims
- 1889US11422451B2Projector having a light source apparatus with structures for shifting lightSEIKO EPSON CORP·Filed 2020·Granted Aug 23, 2022·2 cites·20 claims
- 1989US11119394B2Light source device, illumination optical device, and projectorSEIKO EPSON CORP·Filed 2020·Granted Sep 14, 2021·2 cites·15 claims
- 2089US8985623B2Steering wheel structure with airbag moduleKONDO TAKASHI·Filed 2011·Granted Mar 24, 2015·22 cites·17 claims
- 2189US6618200B2System and method for providing a substrate having micro-lensesSEIKO EPSON CORP·Filed 2001·Granted Sep 9, 2003·30 cites·31 claims
- 2288US9915860B2Wavelength conversion element, illumination device, and projectorSEIKO EPSON CORP·Filed 2016·Granted Mar 13, 2018·4 cites·15 claims
- 2388US9568817B2Illumination apparatus and projectorSEIKO EPSON CORP·Filed 2015·Granted Feb 14, 2017·5 cites·2 claims
- 2486US10805009B2Optical modulation apparatus, and timing adjustment method for optical modulation apparatusMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Oct 13, 2020·3 cites·13 claims
- 2586US10534239B2Optical modulatorMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Jan 14, 2020·3 cites·7 claims
- 2686US7869126B2Screen and projection systemSEIKO EPSON CORP·Filed 2009·Granted Jan 11, 2011·9 cites·13 claims
- 2785US10175566B2Light source device, illumination device, and projectorSEIKO EPSON CORP·Filed 2016·Granted Jan 8, 2019·5 cites·12 claims
- 2885US7052141B2Projector with improved lens apparatusSEIKO EPSON CORP·Filed 2004·Granted May 30, 2006·20 cites·10 claims
- 2984US8791692B2Magnetic position detecting deviceFURUKAWA TAISUKE·Filed 2010·Granted Jul 29, 2014·8 cites·10 claims
- 3084US6850368B2System and method for providing a substrate having micro-lensesSEIKO EPSON CORP·Filed 2003·Granted Feb 1, 2005·19 cites·2 claims
- 3183US9823558B2Light source device, method for manufacturing light source device, and projectorSEIKO EPSON CORP·Filed 2015·Granted Nov 21, 2017·3 cites·12 claims
- 3283US8111457B2Method of manufacturing screen and screenAKIYAMA KOICHI·Filed 2009·Granted Feb 7, 2012·7 cites·17 claims
- 3383US7354162B2ProjectorSEIKO EPSON CORP·Filed 2005·Granted Apr 8, 2008·8 cites·12 claims
- 3483US6851811B2Projector including a relay optical systemSEIKO EPSON CORP·Filed 2003·Granted Feb 8, 2005·25 cites·18 claims
- 3583US6607276B1Illuminating optical system and projectorSEIKO EPSON CORP·Filed 2000·Granted Aug 19, 2003·26 cites·10 claims
- 3683US5412003AUnsaturated polyester resin compositions, molding materials, and molded productsTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1993·Granted May 2, 1995·31 cites·13 claims
- 3782US7628494B2Illuminating apparatus and projectorSEIKO EPSON CORP·Filed 2005·Granted Dec 8, 2009·7 cites·18 claims
- 3882US6155858AFloating electrical connectorHIROSE ELECTRIC CO LTD·Filed 1997·Granted Dec 5, 2000·45 cites·2 claims
- 3981US11951692B2Fiber-reinforced resin material, molded article, method and device for manufacturing fiber-reinforced resin material, and fiber bundle group inspection deviceMITSUBISHI CHEM CORP·Filed 2023·Granted Apr 9, 2024·0 cites·8 claims
- 4081US11204544B2ProjectorSEIKO EPSON CORP·Filed 2020·Granted Dec 21, 2021·1 cites·7 claims
- 4181US10571788B2Light source device, illumination device, and projectorSEIKO EPSON CORP·Filed 2018·Granted Feb 25, 2020·3 cites·17 claims
- 4281US8562152B2Collimator lens unit with aspheric surfaces for imparting a luminous flux density distributionAKIYAMA KOICHI·Filed 2010·Granted Oct 22, 2013·4 cites·15 claims
- 4380US11333960B2Light source device and projector in which wave plates are downsizedSEIKO EPSON CORP·Filed 2020·Granted May 17, 2022·1 cites·16 claims
- 4480US9810977B2Solid-state light source device and projector utilizing a plurality of collimator lensesAKIYAMA KOICHI·Filed 2011·Granted Nov 7, 2017·4 cites·11 claims
- 4580US9632321B2Illumination device and projectorSEIKO EPSON CORP·Filed 2015·Granted Apr 25, 2017·3 cites·6 claims
- 4680US7252410B2ProjectorSEIKO EPSON CORP·Filed 2005·Granted Aug 7, 2007·6 cites·10 claims
- 4780US7204594B2ProjectorSEIKO EPSON CORP·Filed 2006·Granted Apr 17, 2007·6 cites·7 claims
- 4880US7054066B2Projection display device having micro-lensesSEIKO EPSON CORP·Filed 2005·Granted May 30, 2006·7 cites·1 claims
- 4980US6688756B1Light source device, and illuminating optical system and projector including the sameSEIKO EPSON CORP·Filed 2000·Granted Feb 10, 2004·21 cites·35 claims
- 5080US6592986B1Material for molding thermosetting resin sheet, production process, and molded productMITSUI TAKEDA CHEMICALS INC·Filed 1999·Granted Jul 15, 2003·44 cites·7 claims
Showing the top 50 of 242 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →