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Patents Grants
last 30 patents
Information
Patent Grant
Oblique projection optical system and projection type display appar...
Patent number
9,429,832
Issue date
Aug 30, 2016
Hitachi Maxell, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Projection image display apparatus having a first lens and a second...
Patent number
8,690,345
Issue date
Apr 8, 2014
Hitachi Consumer Electronics Co., Ltd.
Koji Hirata
G02 - OPTICS
Information
Patent Grant
Oblique projection optical system and projection type display appar...
Patent number
8,690,349
Issue date
Apr 8, 2014
Hitachi Consumer Electronics Co., Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Video projector which obliquely projects images onto screen
Patent number
8,585,216
Issue date
Nov 19, 2013
Hitachi Consumer Electronics Co., Ltd.
Chohei Ono
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Oblique projection optical system and projection type display appar...
Patent number
8,425,049
Issue date
Apr 23, 2013
Hitachi Consumer Electronics Co., Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Projecting optical unit and projecting type image display apparatus...
Patent number
8,169,708
Issue date
May 1, 2012
Hitachi, Ltd.
Hiroki Yoshikawa
G02 - OPTICS
Information
Patent Grant
Lens for projector
Patent number
D647931
Issue date
Nov 1, 2011
Hitachi Consumer Electronics Co., Ltd.
Masayuki Fukui
D16 - Photography and optical equipment
Information
Patent Grant
Lens for projector
Patent number
D645068
Issue date
Sep 13, 2011
Hitachi Consumer Electronics Co., Ltd.
Masayuki Fukui
D16 - Photography and optical equipment
Information
Patent Grant
Projecting optical unit and projecting type image display apparatus...
Patent number
7,961,400
Issue date
Jun 14, 2011
Hitachi, Ltd.
Hiroki Yoshikawa
G02 - OPTICS
Information
Patent Grant
Mirror for projector
Patent number
D639076
Issue date
Jun 7, 2011
Hitachi Consumer Electronics Co., Ltd.
Masayuki Fukui
D06 - Furnishings
Information
Patent Grant
Projection display, projection optical system and transmission lens...
Patent number
7,670,007
Issue date
Mar 2, 2010
Hitachi, Ltd.
Takanori Hisada
G02 - OPTICS
Information
Patent Grant
Projecting optical unit and projecting type image display apparatus...
Patent number
7,586,687
Issue date
Sep 8, 2009
Hitachi, Ltd.
Hiroki Yoshikawa
G02 - OPTICS
Information
Patent Grant
Projection type image display
Patent number
7,535,648
Issue date
May 19, 2009
Hitachi, Ltd.
Hiroki Yoshikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Projection type image display apparatus
Patent number
7,433,121
Issue date
Oct 7, 2008
Hitachi, Ltd.
Daisuke Imafuku
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Projection lens apparatus and rear projection type image display ap...
Patent number
7,404,646
Issue date
Jul 29, 2008
Hitachi, Ltd.
Yuriko Inadachi
G02 - OPTICS
Information
Patent Grant
Projection lens unit and rear projection type image display system
Patent number
7,347,566
Issue date
Mar 25, 2008
Hitachi, Ltd.
Hidehiro Ikeda
G02 - OPTICS
Information
Patent Grant
Projection lens unit and rear projection type image display system
Patent number
7,172,292
Issue date
Feb 6, 2007
Hitachi, Ltd.
Hidehiro Ikeda
G02 - OPTICS
Information
Patent Grant
Reflection-type image projection unit and a reflection-type image d...
Patent number
7,111,942
Issue date
Sep 26, 2006
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical projection apparatus, transmission type screen, and project...
Patent number
7,081,927
Issue date
Jul 25, 2006
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Reflection-type image projection unit and a reflection-type image d...
Patent number
7,059,725
Issue date
Jun 13, 2006
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical projection apparatus, transmission type screen, and project...
Patent number
6,956,624
Issue date
Oct 18, 2005
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical projection apparatus, transmission type screen, and project...
Patent number
6,894,729
Issue date
May 17, 2005
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Polarized-light converting unit and projector using the same
Patent number
6,869,184
Issue date
Mar 22, 2005
Hitachi, Ltd.
Masahiko Yatsu
G02 - OPTICS
Information
Patent Grant
Liquid crystal display apparatus and optical device for use therein
Patent number
6,829,031
Issue date
Dec 7, 2004
Hitachi, Ltd.
Toru Numata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Projection lens system and projection image display apparatus using...
Patent number
6,801,366
Issue date
Oct 5, 2004
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Projection lens apparatus and rear projection type image display ap...
Patent number
6,768,594
Issue date
Jul 27, 2004
Hitachi, Ltd.
Daisuke Imafuku
G02 - OPTICS
Information
Patent Grant
Projection lens system and projection image display apparatus using...
Patent number
6,624,950
Issue date
Sep 23, 2003
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical projection apparatus, transmission type screen, and project...
Patent number
6,573,950
Issue date
Jun 3, 2003
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Projection display apparatus and projection lens device for use the...
Patent number
6,542,308
Issue date
Apr 1, 2003
Koji Hirata
G02 - OPTICS
Information
Patent Grant
Liquid crystal display apparatus having liquid crystal display elem...
Patent number
6,535,267
Issue date
Mar 18, 2003
Hitachi, Ltd.
Toru Numata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
INFORMATION DISPLAY DEVICE
Publication number
20230118416
Publication date
Apr 20, 2023
Maxell, Ltd.
Koji HIRATA
B60 - VEHICLES IN GENERAL
Information
Patent Application
OBLIQUE PROJECTION OPTICAL SYSTEM AND PROJECTION TYPE DISPLAY APPAR...
Publication number
20140146294
Publication date
May 29, 2014
HITACHI CONSUMER ELECTRONICS CO., LTD.
Koji HIRATA
G02 - OPTICS
Information
Patent Application
OBLIQUE PROJECTION OPTICAL SYSTEM AND PROJECTION TYPE DISPLAY APPAR...
Publication number
20130229633
Publication date
Sep 5, 2013
HITACHI CONSUMER ELECTRONICS CO., LTD.
Koji HIRATA
G02 - OPTICS
Information
Patent Application
PROJECTION IMAGE DISPLAY APPARATUS
Publication number
20120081676
Publication date
Apr 5, 2012
Koji HIRATA
G02 - OPTICS
Information
Patent Application
PROJECTING OPTICAL UNIT AND PROJECTING TYPE IMAGE DISPLAY APPARATUS...
Publication number
20110205499
Publication date
Aug 25, 2011
Hitachi, Ltd
Hiroki YOSHIKAWA
G02 - OPTICS
Information
Patent Application
Video Projector
Publication number
20110075115
Publication date
Mar 31, 2011
HITACHI CONSUMER ELECTRONICS CO., LTD.
Chohei Ono
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
OBLIQUE PROJECTION OPTICAL SYSTEM AND PROJECTION TYPE DISPLAY APPAR...
Publication number
20100171937
Publication date
Jul 8, 2010
Hitachi Consumer Electronics Co., Ltd.
Koji HIRATA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
PROJECTING OPTICAL UNIT AND PROJECTING TYPE IMAGE DISPLAY APPARATUS...
Publication number
20090290133
Publication date
Nov 26, 2009
Hitachi, Ltd
Hiroki YOSHIKAWA
G02 - OPTICS
Information
Patent Application
Projection type image display apparatus
Publication number
20070229948
Publication date
Oct 4, 2007
Hitachi, Ltd
Daisuke Imafuku
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Projection display, projection optical system and transmission lens...
Publication number
20070139623
Publication date
Jun 21, 2007
Takanori Hisada
G02 - OPTICS
Information
Patent Application
Projection lens unit and rear projection type image display system
Publication number
20070109666
Publication date
May 17, 2007
Hitachi, Ltd
Hidehiro Ikeda
G02 - OPTICS
Information
Patent Application
Projection type image display
Publication number
20070103604
Publication date
May 10, 2007
Hiroki Yoshikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Projecting optical unit and projecting type image display apparatus...
Publication number
20060227432
Publication date
Oct 12, 2006
Hiroki Yoshikawa
G02 - OPTICS
Information
Patent Application
Projection lens apparatus and rear projection type image display ap...
Publication number
20050259228
Publication date
Nov 24, 2005
Yuriko Inadachi
G02 - OPTICS
Information
Patent Application
Optical projection apparatus, transmission type screen, and project...
Publication number
20050088576
Publication date
Apr 28, 2005
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Projection lens unit and rear projection type image display system
Publication number
20050052628
Publication date
Mar 10, 2005
Hitachi, Ltd
Hidehiro Ikeda
G02 - OPTICS
Information
Patent Application
Liquid crystal display apparatus and optical device for use therein
Publication number
20050001970
Publication date
Jan 6, 2005
Toru Numata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Reflection-type image projection unit and a reflection-type image d...
Publication number
20040218281
Publication date
Nov 4, 2004
Hitachi, Ltd
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Polarized-light converting unit and projector using the same
Publication number
20040105150
Publication date
Jun 3, 2004
Masahiko Yatsu
G02 - OPTICS
Information
Patent Application
Projection lens system and projection image display apparatus using...
Publication number
20040017616
Publication date
Jan 29, 2004
Hitachi, Ltd.
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Reflection-type image projection unit and a reflection-type image d...
Publication number
20030231286
Publication date
Dec 18, 2003
Hitachi, Ltd
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical projection apparatus, transmission type screen, and project...
Publication number
20030202127
Publication date
Oct 30, 2003
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical projection apparatus, transmission type screen, and project...
Publication number
20030197812
Publication date
Oct 23, 2003
Koji Hirata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Liquid crystal display apparatus and optical device for use therein
Publication number
20030098944
Publication date
May 29, 2003
Hitachi, Ltd.
Toru Numata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Projection lens apparatus and rear projection type image display ap...
Publication number
20030095238
Publication date
May 22, 2003
Hitachi, Ltd
Daisuke Imafuku
G02 - OPTICS
Information
Patent Application
Projection lens system and projection image display apparatus using...
Publication number
20020196556
Publication date
Dec 26, 2002
Hitachi, Ltd.
Koji Hirata
G02 - OPTICS
Information
Patent Application
Projection display apparatus and projection lens device for use the...
Publication number
20020034017
Publication date
Mar 21, 2002
Koji Hirata
G02 - OPTICS
Information
Patent Application
Projection lens system and projection image display apparatus using...
Publication number
20020008918
Publication date
Jan 24, 2002
Hitachi, Ltd.
Koji Hirata
G02 - OPTICS
Information
Patent Application
Liquid crystal display apparatus and optical device for use therein
Publication number
20010033345
Publication date
Oct 25, 2001
Hitachi, Ltd.
Toru Numata
G02 - OPTICS