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Kiyokazu Watanabe

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  • Minamitsuru-gun, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Backlight device
    • Patent number 11,754,878
    • Issue date Sep 12, 2023
    • Nichia Corporation
    • Toshinobu Katsumata
    • G02 - OPTICS
  • Information Patent Grant

    Backlight device
    • Patent number 11,681,181
    • Issue date Jun 20, 2023
    • Nichia Corporation
    • Toshinobu Katsumata
    • G02 - OPTICS
  • Information Patent Grant

    Backlight
    • Patent number 11,675,230
    • Issue date Jun 13, 2023
    • Nichia Corporation
    • Takuma Horiuchi
    • G02 - OPTICS
  • Information Patent Grant

    Backlight
    • Patent number 11,506,935
    • Issue date Nov 22, 2022
    • Nichia Corporation
    • Takuma Horiuchi
    • G02 - OPTICS
  • Information Patent Grant

    Backlight
    • Patent number 11,054,700
    • Issue date Jul 6, 2021
    • Citizen Electronics Co., Ltd.
    • Takuma Horiuchi
    • G02 - OPTICS
  • Information Patent Grant

    Backlight
    • Patent number 10,302,840
    • Issue date May 28, 2019
    • Citizen Watch Co., Ltd.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Grant

    Side edge planar lighting unit
    • Patent number 10,001,672
    • Issue date Jun 19, 2018
    • CITIZEN ELECTRONICS CO., LTD.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Grant

    Planar light-emitting device
    • Patent number 8,616,749
    • Issue date Dec 31, 2013
    • Citizen Electronics Co., Ltd.
    • Takahiro Shimizu
    • G02 - OPTICS
  • Information Patent Grant

    Lightguide plate of a double-sided illumination backlight and a dou...
    • Patent number 7,527,411
    • Issue date May 5, 2009
    • Citizen Electronics Co., Ltd.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Grant

    Lighting device with light guide plate illuminated by LED
    • Patent number 7,488,103
    • Issue date Feb 10, 2009
    • Citizen Electronics Co., Ltd.
    • Kiyokazu Watanabe
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Two-sided-emission-type back light unit and display using said back...
    • Patent number 7,478,938
    • Issue date Jan 20, 2009
    • Citizen Electronics Co., Ltd.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Grant

    Sheet light emitting apparatus
    • Patent number 7,072,116
    • Issue date Jul 4, 2006
    • Citizen Electronics Co., Ltd.
    • Daisaku Okuwaki
    • G02 - OPTICS

Patents Applicationslast 30 patents

  • Information Patent Application

    BACKLIGHT
    • Publication number 20230044687
    • Publication date Feb 9, 2023
    • NICHIA CORPORATION
    • Takuma HORIUCHI
    • G02 - OPTICS
  • Information Patent Application

    BACKLIGHT DEVICE
    • Publication number 20220221761
    • Publication date Jul 14, 2022
    • Nichia Corporation.
    • Toshinobu KATSUMATA
    • G02 - OPTICS
  • Information Patent Application

    BACKLIGHT DEVICE
    • Publication number 20210341793
    • Publication date Nov 4, 2021
    • Citizen Electronics Co., Ltd.
    • Toshinobu KATSUMATA
    • G02 - OPTICS
  • Information Patent Application

    BACKLIGHT
    • Publication number 20210278723
    • Publication date Sep 9, 2021
    • CITIZEN ELECTRONICS CO., LTD.
    • Takuma HORIUCHI
    • G02 - OPTICS
  • Information Patent Application

    BACKLIGHT
    • Publication number 20210109405
    • Publication date Apr 15, 2021
    • CITIZEN ELECTRONICS CO., LTD.
    • Takuma HORIUCHI
    • G02 - OPTICS
  • Information Patent Application

    SIDE EDGE PLANAR LIGHTING UNIT
    • Publication number 20180120643
    • Publication date May 3, 2018
    • CITIZEN ELECTRONICS CO., LTD.
    • Kiyokazu WATANABE
    • G02 - OPTICS
  • Information Patent Application

    BACKLIGHT
    • Publication number 20170276861
    • Publication date Sep 28, 2017
    • Citizen Watch Co., Ltd.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Application

    PLANAR LIGHTING DEVICE AND DISPLAY DEVICE INCLUDING PLANAR LIGHTING...
    • Publication number 20150168632
    • Publication date Jun 18, 2015
    • CITIZEN ELECTRONICS CO., LTD.
    • Makoto Yasuhara
    • G02 - OPTICS
  • Information Patent Application

    PLANAR LIGHT-EMITTING DEVICE
    • Publication number 20120250313
    • Publication date Oct 4, 2012
    • CITIZEN HOLDINGS CO., LTD.
    • Takahiro SHIMIZU
    • G02 - OPTICS
  • Information Patent Application

    Lightguide plate of a double-sided illumination backlight and a dou...
    • Publication number 20070217227
    • Publication date Sep 20, 2007
    • Citizen Electronics Co., Ltd.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Application

    Light guide plate
    • Publication number 20070189033
    • Publication date Aug 16, 2007
    • CITIZEN ELECTRONICS CO., LTD.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Application

    Lighting device
    • Publication number 20070058392
    • Publication date Mar 15, 2007
    • CITIZEN ELECTRONICS CO., LTD.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Application

    Two-sided-emission-type back light unit and display using said back...
    • Publication number 20060203516
    • Publication date Sep 14, 2006
    • Citizen Electronics Co. Ltd.
    • Kiyokazu Watanabe
    • G02 - OPTICS
  • Information Patent Application

    Backlight system
    • Publication number 20050185423
    • Publication date Aug 25, 2005
    • Citizen Electronics Co., Ltd.
    • Junji Miyashita
    • G02 - OPTICS
  • Information Patent Application

    Sheet light emitting apparatus
    • Publication number 20040246601
    • Publication date Dec 9, 2004
    • Citizen Electronics Co., Ltd.
    • Daisaku Okuwaki
    • G02 - OPTICS