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Keisuke Sakai

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Patents Grantslast 30 patents

  • Information Patent Grant

    Mold-release film
    • Patent number 11,919,205
    • Issue date Mar 5, 2024
    • KOBAYASHI & CO., LTD.
    • Keisuke Sakai
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Release film and method of manufacturing release film
    • Patent number 11,920,012
    • Issue date Mar 5, 2024
    • KOBAYASHI & CO., LTD.
    • Keisuke Sakai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Light emitting device
    • Patent number 11,817,530
    • Issue date Nov 14, 2023
    • Citizen Electronics Co., Ltd.
    • Keisuke Sakai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    LED drive circuit
    • Patent number 10,433,381
    • Issue date Oct 1, 2019
    • Citizen Watch Co., Ltd
    • Keisuke Sakai
    • Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
  • Information Patent Grant

    LED lighting apparatus
    • Patent number 9,485,830
    • Issue date Nov 1, 2016
    • Citizen Holdings Co., Ltd.
    • Keisuke Sakai
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    LED lighting device
    • Patent number 9,380,657
    • Issue date Jun 28, 2016
    • Citizen Holdings Co., Ltd.
    • Takashi Akiyama
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    LED drive circuit
    • Patent number 9,277,615
    • Issue date Mar 1, 2016
    • Citizen Holdings Co., Ltd.
    • Keisuke Sakai
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    LED driving circuit
    • Patent number 8,933,636
    • Issue date Jan 13, 2015
    • Citizen Holdings Co., Ltd.
    • Shunji Egawa
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    LED light source and chromaticity adjustment method for LED light s...
    • Patent number 8,592,849
    • Issue date Nov 26, 2013
    • Citizen Holdings Co., Ltd.
    • Keisuke Sakai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    LED light source and chromaticity adjustment method for LED light s...
    • Patent number 8,222,054
    • Issue date Jul 17, 2012
    • Citizen Holdings Co., Ltd.
    • Keisuke Sakai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    LED light source and method for adjusting chromaticity of LED light...
    • Patent number 7,884,545
    • Issue date Feb 8, 2011
    • Citizen Holdings Co., Ltd.
    • Masafumi Yokoyama
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

  • Information Patent Application

    LIGHT EMITTING DEVICE
    • Publication number 20230231082
    • Publication date Jul 20, 2023
    • Citizen Electronics Co., Ltd.
    • Keisuke SAKAI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    MOLD-RELEASE FILM
    • Publication number 20230054528
    • Publication date Feb 23, 2023
    • KOBAYASHI & CO.,LTD.
    • Keisuke SAKAI
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    RELEASE FILM AND METHOD FOR MANUFACTURING RELEASE FILM
    • Publication number 20220396011
    • Publication date Dec 15, 2022
    • KOBAYASHI & CO., LTD.
    • Keisuke SAKAI
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    FILM AND METHOD OF MANUFACTURING FLUORORESIN COMPOSITION
    • Publication number 20220162479
    • Publication date May 26, 2022
    • KOBAYASHI & CO.,LTD.
    • Keisuke SAKAI
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    COMBINATION OF MOLD AND RELEASE FILM, RELEASE FILM, MOLD, AND METHO...
    • Publication number 20220152882
    • Publication date May 19, 2022
    • KOBAYASHI & CO.,LTD.
    • Keisuke SAKAI
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    RELEASE FILM AND METHOD OF MANUFACTURING RELEASE FILM
    • Publication number 20210253815
    • Publication date Aug 19, 2021
    • KOBAYASHI & CO.,LTD.
    • Keisuke SAKAI
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    RELEASE FILM AND METHOD OF MANUFACTURING RELEASE FILM
    • Publication number 20210257228
    • Publication date Aug 19, 2021
    • KOBAYASHI & CO.,LTD.
    • Keisuke SAKAI
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    LED DRIVE CIRCUIT
    • Publication number 20180288843
    • Publication date Oct 4, 2018
    • CITIZEN WATCH CO.,LTD.
    • Keisuke SAKAI
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    LED DRIVE CIRCUIT
    • Publication number 20150382420
    • Publication date Dec 31, 2015
    • CITIZEN HOLDINGS CO., LTD.
    • Keisuke Sakai
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    LED LIGHTING DEVICE
    • Publication number 20140361695
    • Publication date Dec 11, 2014
    • Takashi Akiyama
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    LED LIGHTING APPARATUS
    • Publication number 20140197741
    • Publication date Jul 17, 2014
    • Citizen Electronics Co., Ltd.
    • Keisuke Sakai
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    LED DRIVING CIRCUIT
    • Publication number 20120299492
    • Publication date Nov 29, 2012
    • Shunji Egawa
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    LED Light Source and Chromaticity Adjustment Method for LED Light S...
    • Publication number 20120268007
    • Publication date Oct 25, 2012
    • CITIZEN HOLDINGS CO., LTD.
    • Keisuke Sakai
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    LED LIGHT SOURCE AND METHOD FOR ADJUSTING CHROMATICITY OF LED LIGHT...
    • Publication number 20090236967
    • Publication date Sep 24, 2009
    • Masafumi Yokoyama
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR