Inventor
YATSU MASAHIKO
JP148 patents
⚠️ This page may combine multiple inventors who share the name “YATSU MASAHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
38 patentsUS6573950B1Jun 3, 2003
Optical projection apparatus, transmission type screen, and projection type image display apparatus
HITACHI LTD46 citations96
US6290360B1Sep 18, 2001
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD59 citations95
US8020999B2Sep 20, 2011
Projection type image display apparatus
HITACHI LTD10 citations93
US8002418B2Aug 23, 2011
Projection type image display apparatus
HITACHI LTD10 citations93
US7914153B2Mar 29, 2011
Projection type image display apparatus
HITACHI LTD11 citations93
US7766488B2Aug 3, 2010
Projection type image display apparatus
HITACHI LTD15 citations93
US7081927B2Jul 25, 2006
Optical projection apparatus, transmission type screen, and projection type image display apparatus
HITACHI LTD17 citations93
US6956624B2Oct 18, 2005
Optical projection apparatus, transmission type screen, and projection type image display apparatus
HITACHI LTD20 citations93
US6894729B2May 17, 2005
Optical projection apparatus, transmission type screen, and projection type image display apparatus
HITACHI LTD21 citations93
US7410264B2Aug 12, 2008
Image display apparatus forming optical image by irradiating light from light source onto image display element
HITACHI LTD22 citations92
US7255444B2Aug 14, 2007
Optical unit and projection-type image display apparatus using the same
HITACHI LTD22 citations92
US7232227B2Jun 19, 2007
Image display device
HITACHI LTD21 citations92
US6783245B2Aug 31, 2004
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD17 citations92
US6560041B2May 6, 2003
Projection lens apparatus and projection type image display apparatus
HITACHI LTD30 citations92
US6416182B1Jul 9, 2002
Projection type liquid crystal display device
HITACHI LTD24 citations92
US6411440B2Jun 25, 2002
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD19 citations92
US6256083B1Jul 3, 2001
Liquid crystal display apparatus and optical device for use therein
HITACHI LTD19 citations92
US6201645B1Mar 13, 2001
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD21 citations92
US6062695AMay 16, 2000
Projection type liquid crystal display device
HITACHI LTD40 citations92
US5748238AMay 5, 1998
Video camera
HITACHI LTD30 citations92
US8002417B2Aug 23, 2011
Projection-type image display apparatus
HITACHI LTD11 citations84
US7896507B2Mar 1, 2011
Projection type display apparatus
HITACHI LTD7 citations84
US7857462B2Dec 28, 2010
Projection optical unit, projection-type image displaying apparatus and projection-type image displaying system
HITACHI LTD11 citations84
US7850313B2Dec 14, 2010
Projection type image display apparatus
HITACHI LTD8 citations84
US7780296B2Aug 24, 2010
Projection optical unit, projection-type image displaying apparatus and projection-type image displaying system
HITACHI LTD9 citations84
US7766487B2Aug 3, 2010
Projection-type image display apparatus
HITACHI LTD8 citations84
US7670009B2Mar 2, 2010
Projection-type image display apparatus
HITACHI LTD10 citations84
US7532407B2May 12, 2009
Projection display
HITACHI LTD8 citations84
US7467872B2Dec 23, 2008
Projection optical unit and projection type video display device using the unit
HITACHI LTD16 citations84
US7220005B2May 22, 2007
Projection type video display apparatus
HITACHI LTD12 citations84
US7170567B2Jan 30, 2007
Projection type image display apparatus
HITACHI LTD10 citations84
US6987546B2Jan 17, 2006
Projection type image display apparatus
HITACHI LTD15 citations84
US6975460B2Dec 13, 2005
Projection lens apparatus and projection type image display apparatus
HITACHI LTD12 citations84
US6783242B1Aug 31, 2004
Projection apparatus and projection-type image display apparatus
HITACHI LTD15 citations84
US6392809B2May 21, 2002
Array lens, lighting optical system, optical unit and imaging apparatus
HITACHI LTD10 citations82
US7901097B2Mar 8, 2011
Display apparatus and projection type lighting apparatus therefor
HITACHI LTD5 citations74
US7553031B2Jun 30, 2009
Projection image display apparatus and projection optical unit to be used therein
HITACHI LTD6 citations74
US7159988B2Jan 9, 2007
Projection optical unit and projection image display apparatus
HITACHI LTD9 citations74
HIRATA KOJI
5 patentsUS8313199B2Nov 20, 2012
Projection display system including lens group and reflecting mirror
HIRATA KOJI16 citations92
US8182097B2May 22, 2012
Projection type image display apparatus
HIRATA KOJI10 citations92
US8441582B2May 14, 2013
Imaging displaying apparatus and 3-D image displaying apparatus applying the same therein
HIRATA KOJI7 citations84
US8425049B2Apr 23, 2013
Oblique projection optical system and projection type display apparatus using the same
HIRATA KOJI8 citations84
US8408717B2Apr 2, 2013
Projection type image display apparatus
HIRATA KOJI8 citations84
MAXELL LTD
4 patentsHITACHI CONSUMER ELECTRONICS
3 patentsUS9429832B2Aug 30, 2016
Oblique projection optical system and projection type display apparatus using the same
HITACHI CONSUMER ELECTRONICS6 citations84
US8690349B2Apr 8, 2014
Oblique projection optical system and projection type display apparatus using the same
HITACHI CONSUMER ELECTRONICS9 citations84
USD639076SJun 7, 2011
Mirror for projector
HITACHI CONSUMER ELECTRONICS14 citations83
Showing the top 50 of 148 patents by PatentIndex Score.