Inventor · disambiguated record
Akitaka Yajima
Also filed as: YAJIMA AKITAKA
50 granted patents·2 pending applications·1,511 citations·filing 1988–2015
99Inventor score
Files withSEIKO EPSON CORP52
Top patents by PatentIndex Score
52 records- 0196US6652104B2Correction of image distortionSEIKO EPSON CORP·Filed 2002·Granted Nov 25, 2003·99 cites·9 claims
- 0296US6404550B1Optical element suitable for projection display apparatusSEIKO EPSON CORP·Filed 1997·Granted Jun 11, 2002·141 cites·12 claims
- 0394US4850685AProjection-type color display deviceSEIKO EPSON CORP·Filed 1988·Granted Jul 25, 1989·110 cites·12 claims
- 0490US6778228B2Projection-type display apparatusSEIKO EPSON CORP·Filed 2002·Granted Aug 17, 2004·40 cites·15 claims
- 0590US6309073B1ProjectorSEIKO EPSON CORP·Filed 2000·Granted Oct 30, 2001·23 cites·16 claims
- 0690US5865521AProjection-type display apparatusSEIKO EPSON CORP·Filed 1997·Granted Feb 2, 1999·92 cites·19 claims
- 0790US5626409AProjection-type display apparatusSEIKO EPSON CORP·Filed 1994·Granted May 6, 1997·70 cites·29 claims
- 0889US5743610AProjection-type display apparatusSEIKO EPSON CORP·Filed 1996·Granted Apr 28, 1998·102 cites·20 claims
- 0988US5978136AOptical element, polarization illumination device, and projection display apparatusSEIKO EPSON CORP·Filed 1997·Granted Nov 2, 1999·87 cites·22 claims
- 1087US6000802AProjection-type display apparatusSEIKO EPSON CORP·Filed 1998·Granted Dec 14, 1999·52 cites·19 claims
- 1186US4909601AProjection-type color display device with light valves positioned at unequal distances from the light sourceSEIKO EPSON CORP·Filed 1988·Granted Mar 20, 1990·48 cites·51 claims
- 1285US5191450AProjection-type color display device having a driving circuit for producing a mirror-like imageSEIKO EPSON CORP·Filed 1992·Granted Mar 2, 1993·67 cites·30 claims
- 1383US6690282B2Light-source lamp unit, light-source device and projection-type display apparatusSEIKO EPSON CORP·Filed 2001·Granted Feb 10, 2004·22 cites·20 claims
- 1483US6540360B2ProjectorSEIKO EPSON CORP·Filed 1999·Granted Apr 1, 2003·20 cites·17 claims
- 1583US6084714APolarizing illumination device and projection display deviceSEIKO EPSON CORP·Filed 1999·Granted Jul 4, 2000·63 cites·8 claims
- 1682US7006004B2Light-source lamp unit, light-source device and projection-type display apparatusSEIKO EPSON CORP·Filed 2003·Granted Feb 28, 2006·16 cites·2 claims
- 1782US6529250B1ProjectorSEIKO EPSON CORP·Filed 1998·Granted Mar 4, 2003·53 cites·22 claims
- 1881US9250507B2ProjectorSEIKO EPSON CORP·Filed 2013·Granted Feb 2, 2016·4 cites·6 claims
- 1981USRE38084EProjectorSEIKO EPSON CORP·Filed 2001·Granted Apr 22, 2003·16 cites·46 claims
- 2080US6523962B2Optical element suitable for projection display apparatusSEIKO EPSON CORP·Filed 2002·Granted Feb 25, 2003·17 cites·6 claims
- 2180US6268799B1Light-source lamp unit, light-source device and projection-type display apparatus and method of useSEIKO EPSON CORP·Filed 1997·Granted Jul 31, 2001·50 cites·24 claims
- 2278USD420455SReplacement lamp for projectorSEIKO EPSON CORP·Filed 1997·Granted Feb 8, 2000·21 cites·1 claims
- 2376US6669345B2Illumination system and projectorSEIKO EPSON CORP·Filed 2002·Granted Dec 30, 2003·12 cites·23 claims
- 2476US6394607B1Polarized 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
- 2574USRE41680EProjectorSEIKO EPSON CORP·Filed 2007·Granted Sep 14, 2010·2 cites·63 claims
- 2673US6120152AProjection-type display apparatusSEIKO EPSON CORP·Filed 1997·Granted Sep 19, 2000·31 cites·16 claims
- 2772USRE40251EOptical element, polarization illumination device, and projectorSEIKO EPSON CORP·Filed 2005·Granted Apr 22, 2008·2 cites·24 claims
- 2872US6425667B1Projection lens unit and projector using the sameSEIKO EPSON CORP·Filed 2000·Granted Jul 30, 2002·13 cites·12 claims
- 2970US6856375B2Liquid crystal light valve and projection display device including the sameSEIKO EPSON CORP·Filed 2001·Granted Feb 15, 2005·9 cites·5 claims
- 3070US6095653AProjection-type display apparatusSEIKO EPSON CORP·Filed 1998·Granted Aug 1, 2000·26 cites·13 claims
- 3170US5909944AProjection-type display apparatusSEIKO EPSON CORP·Filed 1998·Granted Jun 8, 1999·26 cites·4 claims
- 3269US6247817B1ProjectorSEIKO EPSON CORP·Filed 2000·Granted Jun 19, 2001·9 cites·6 claims
- 3367US6141150ADichroic prism, prism unit, and projection display apparatusSEIKO EPSON CORP·Filed 1997·Granted Oct 31, 2000·25 cites·20 claims
- 3466US7267443B2Light-modulating projectorSEIKO EPSON CORP·Filed 2005·Granted Sep 11, 2007·2 cites·11 claims
- 3565US6637886B2Projection display deviceSEIKO EPSON CORP·Filed 2003·Granted Oct 28, 2003·5 cites·5 claims
- 3664USRE39040EProjectorSEIKO EPSON CORP·Filed 2002·Granted Mar 28, 2006·6 cites·25 claims
- 3759US6612702B1Projection display deviceSEIKO EPSON CORP·Filed 1999·Granted Sep 2, 2003·5 cites·18 claims
- 3858USRE39243EOptical element, polarization illumination device, and projectorSEIKO EPSON CORP·Filed 2001·Granted Aug 22, 2006·2 cites·24 claims
- 3958US6072635ADichroic prism and projection display apparatusSEIKO EPSON CORP·Filed 1998·Granted Jun 6, 2000·15 cites·18 claims
- 4057US6894845B2System and methods for providing a zoom lens deviceSEIKO EPSON CORP·Filed 2001·Granted May 17, 2005·5 cites·18 claims
- 4156USRE39702EProjectorSEIKO EPSON CORP·Filed 2001·Granted Jun 26, 2007·1 cites·52 claims
- 4255USRE38740EDichroic prism and projection display apparatusSEIKO EPSON CORP·Filed 2002·Granted Jun 7, 2005·3 cites·24 claims
- 4353US9794535B2Display deviceSEIKO EPSON CORP·Filed 2014·Granted Oct 17, 2017·0 cites·11 claims
- 4452US6142634AProjectorSEIKO EPSON CORP·Filed 1997·Granted Nov 7, 2000·12 cites·21 claims
- 4548US6517208B1Illumination system and projectorSEIKO EPSON CORP·Filed 2000·Granted Feb 11, 2003·1 cites·25 claims
- 4647US6172815B1Dichroic prism and projection display apparatusSEIKO EPSON CORP·Filed 1999·Granted Jan 9, 2001·9 cites·4 claims
- 4747US2002057420A1Projection-type display apparatusSEIKO EPSON CORP·Filed 2001·Application pending·0 cites
- 4843USRE39859EDichroic prism, prism unit, and projection display apparatusSEIKO EPSON CORP·Filed 1997·Granted Sep 25, 2007·8 cites·25 claims
- 4940US6315417B1ProjectorSEIKO EPSON CORP·Filed 1998·Granted Nov 13, 2001·7 cites·14 claims
- 5040US6278500B1Liquid crystal device and projector display device having a specific relationship for the F-numbers of the illumination optical systemSEIKO EPSON CORP·Filed 1999·Granted Aug 21, 2001·8 cites·13 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →