Inventor · disambiguated record
Masahiko Yatsu
Also filed as: YATSU MASAHIKO
147 granted patents·24 pending applications·979 citations·filing 1990–2025
99Inventor score
Top patents by PatentIndex Score
171 records- 0196US6573950B1Optical projection apparatus, transmission type screen, and projection type image display apparatusHITACHI LTD·Filed 2000·Granted Jun 3, 2003·46 cites·5 claims
- 0295US11828938B2Information display apparatusMAXELL LTD·Filed 2021·Granted Nov 28, 2023·2 cites·13 claims
- 0395US8182097B2Projection type image display apparatusHIRATA KOJI·Filed 2011·Granted May 22, 2012·10 cites·14 claims
- 0495US7914153B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Mar 29, 2011·11 cites·4 claims
- 0595US6290360B1Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 1998·Granted Sep 18, 2001·59 cites·8 claims
- 0694US7255444B2Optical unit and projection-type image display apparatus using the sameHITACHI LTD·Filed 2005·Granted Aug 14, 2007·22 cites·26 claims
- 0794US7232227B2Image display deviceHITACHI LTD·Filed 2005·Granted Jun 19, 2007·21 cites·19 claims
- 0893US8313199B2Projection display system including lens group and reflecting mirrorHIRATA KOJI·Filed 2007·Granted Nov 20, 2012·16 cites·18 claims
- 0993US8020999B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Sep 20, 2011·10 cites·4 claims
- 1093US8002418B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Aug 23, 2011·10 cites·13 claims
- 1193US8002417B2Projection-type image display apparatusHITACHI LTD·Filed 2010·Granted Aug 23, 2011·11 cites·13 claims
- 1293US7850313B2Projection type image display apparatusHITACHI LTD·Filed 2010·Granted Dec 14, 2010·8 cites·6 claims
- 1392US11016380B2Projection video display apparatusMAXELL LTD·Filed 2020·Granted May 25, 2021·3 cites·7 claims
- 1492US10890763B2Information display apparatusMAXELL LTD·Filed 2017·Granted Jan 12, 2021·8 cites·6 claims
- 1592US6560041B2Projection lens apparatus and projection type image display apparatusHITACHI LTD·Filed 2001·Granted May 6, 2003·30 cites·17 claims
- 1691US10100995B2Vehicular lighting apparatusMAXELL LTD·Filed 2014·Granted Oct 16, 2018·10 cites·8 claims
- 1791US8408717B2Projection type image display apparatusHIRATA KOJI·Filed 2012·Granted Apr 2, 2013·8 cites·13 claims
- 1891US7766488B2Projection type image display apparatusHITACHI LTD·Filed 2007·Granted Aug 3, 2010·15 cites·17 claims
- 1990US10670864B2Information display deviceMAXELL LTD·Filed 2015·Granted Jun 2, 2020·7 cites·20 claims
- 2090US7857462B2Projection optical unit, projection-type image displaying apparatus and projection-type image displaying systemHITACHI LTD·Filed 2010·Granted Dec 28, 2010·11 cites·4 claims
- 2190US7410264B2Image display apparatus forming optical image by irradiating light from light source onto image display elementHITACHI LTD·Filed 2005·Granted Aug 12, 2008·22 cites·16 claims
- 2290US6894729B2Optical projection apparatus, transmission type screen, and projection type image display apparatusHITACHI LTD·Filed 2003·Granted May 17, 2005·21 cites·14 claims
- 2390US2025298244A1Projection 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
- 2489US11921287B2Information display apparatusMAXELL LTD·Filed 2018·Granted Mar 5, 2024·4 cites·4 claims
- 2589US11119315B2Information display apparatusMAXELL LTD·Filed 2015·Granted Sep 14, 2021·6 cites·14 claims
- 2689US8690349B2Oblique projection optical system and projection type display apparatus using the sameHITACHI CONSUMER ELECTRONICS·Filed 2013·Granted Apr 8, 2014·9 cites·15 claims
- 2789US7670009B2Projection-type image display apparatusHITACHI LTD·Filed 2009·Granted Mar 2, 2010·10 cites·5 claims
- 2889US6956624B2Optical projection apparatus, transmission type screen, and projection type image display apparatusHITACHI LTD·Filed 2003·Granted Oct 18, 2005·20 cites·16 claims
- 2988US11686937B2VehicleMAXELL LTD·Filed 2021·Granted Jun 27, 2023·1 cites·8 claims
- 3088US10606161B2Projection video display apparatusMAXELL LTD·Filed 2016·Granted Mar 31, 2020·5 cites·9 claims
- 3188US7220005B2Projection type video display apparatusHITACHI LTD·Filed 2005·Granted May 22, 2007·12 cites·19 claims
- 3288US7081927B2Optical projection apparatus, transmission type screen, and projection type image display apparatusHITACHI LTD·Filed 2004·Granted Jul 25, 2006·17 cites·30 claims
- 3387US10942353B2Information display deviceMAXELL LTD·Filed 2020·Granted Mar 9, 2021·2 cites·8 claims
- 3487US10214141B2Headlight device and vehicle device using sameMAXELL LTD·Filed 2014·Granted Feb 26, 2019·5 cites·6 claims
- 3587US7780296B2Projection optical unit, projection-type image displaying apparatus and projection-type image displaying systemHITACHI LTD·Filed 2008·Granted Aug 24, 2010·9 cites·12 claims
- 3686US7896507B2Projection type display apparatusHITACHI LTD·Filed 2008·Granted Mar 1, 2011·7 cites·20 claims
- 3786US7766487B2Projection-type image display apparatusHITACHI LTD·Filed 2007·Granted Aug 3, 2010·8 cites·14 claims
- 3886US7532407B2Projection displayHITACHI LTD·Filed 2006·Granted May 12, 2009·8 cites·3 claims
- 3986US7467872B2Projection optical unit and projection type video display device using the unitHITACHI LTD·Filed 2005·Granted Dec 23, 2008·16 cites·9 claims
- 4086US6783245B2Liquid crystal projector, and projection lens unit, optical unit and cooling system for the sameHITACHI LTD·Filed 2001·Granted Aug 31, 2004·17 cites·4 claims
- 4186US6411440B2Array lens, lighting optical system, optical unit and imaging apparatusHITACHI LTD·Filed 2000·Granted Jun 25, 2002·19 cites·16 claims
- 4286US2025271670A1VehicleMAXELL LTD·Filed 2025·Application pending·0 cites
- 4385US12352959B2Projection optical system and head-up display device and vehicle including projection optical system and head-up display deviceMAXELL LTD·Filed 2024·Granted Jul 8, 2025·0 cites·11 claims
- 4485US9429832B2Oblique projection optical system and projection type display apparatus using the sameHITACHI CONSUMER ELECTRONICS·Filed 2014·Granted Aug 30, 2016·6 cites·15 claims
- 4585US2025102798A1Information display apparatusMAXELL LTD·Filed 2024·Application pending·0 cites
- 4684US12287480B2Information display apparatusMAXELL LTD·Filed 2024·Granted Apr 29, 2025·0 cites·8 claims
- 4784US6416182B1Projection type liquid crystal display deviceHITACHI LTD·Filed 2000·Granted Jul 9, 2002·24 cites·18 claims
- 4883US8441582B2Imaging displaying apparatus and 3-D image displaying apparatus applying the same thereinHIRATA KOJI·Filed 2008·Granted May 14, 2013·7 cites·20 claims
- 4983US2024345393A1Head-up display apparatus and image display apparatus thereofMAXELL LTD·Filed 2024·Application pending·0 cites
- 5082US12332435B2VehicleMAXELL LTD·Filed 2024·Granted Jun 17, 2025·0 cites·7 claims
Showing the top 50 of 171 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →