TREA

Hayato Yamaguchi

Follow

Person

  • Ibaraki, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Battery pack, electrical device using battery pack, and electrical...
    • Patent number 11,824,169
    • Issue date Nov 21, 2023
    • KOKI HOLDINGS CO., LTD.
    • Tomomasa Nishikawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Battery pack, and electric appliance using battery pack
    • Patent number 11,757,293
    • Issue date Sep 12, 2023
    • KOKI HOLDINGS CO., LTD.
    • Tomomasa Nishikawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Work device
    • Patent number 11,469,699
    • Issue date Oct 11, 2022
    • KOKI HOLDINGS CO., LTD.
    • Yuki Ishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Battery pack, electrical device using battery pack, and electrical...
    • Patent number 11,205,820
    • Issue date Dec 21, 2021
    • KOKI HOLDINGS CO., LTD.
    • Hiroyuki Hanawa
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Portable electric cutter
    • Patent number 10,201,865
    • Issue date Feb 12, 2019
    • KOKI HOLDINGS CO., LTD.
    • Hayato Yamaguchi
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Portable electric cutter
    • Patent number 9,808,872
    • Issue date Nov 7, 2017
    • Hitachi Koki Co., Ltd.
    • Hayato Yamaguchi
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Impact tool
    • Patent number 9,616,558
    • Issue date Apr 11, 2017
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Brushless motor and electric-powered tool
    • Patent number 9,397,535
    • Issue date Jul 19, 2016
    • Hitachi Koki Co., Ltd.
    • Hayato Yamaguchi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Impact tool
    • Patent number 9,314,908
    • Issue date Apr 19, 2016
    • Hitachi Koki Co., Ltd.
    • Hideyuki Tanimoto
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Power tool having display that displays residual capacity of battery
    • Patent number 9,197,153
    • Issue date Nov 24, 2015
    • Hitachi Koki Co., Ltd.
    • Kenichirou Yoshida
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Patents Applicationslast 30 patents

  • Information Patent Application

    BATTERY PACK, ELECTRIC DEVICE USING BATTERY PACK, AND ELECTRIC DEVI...
    • Publication number 20240055674
    • Publication date Feb 15, 2024
    • Koki Holdings Co., Ltd.
    • Tomomasa NISHIKAWA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    WORK DEVICE
    • Publication number 20200403544
    • Publication date Dec 24, 2020
    • Koki Holdings Co., Ltd.
    • Yuki ISHIKAWA
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    BATTERY PACK, ELECTRIC APPLIANCE USING BATTERY PACK, AND ELECTRIC A...
    • Publication number 20190259984
    • Publication date Aug 22, 2019
    • Koki Holdings Co., Ltd.
    • Tomomasa NISHIKAWA
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    BATTERY PACK, ELECTRICAL DEVICE USING BATTERY PACK, AND ELECTRICAL...
    • Publication number 20190259985
    • Publication date Aug 22, 2019
    • Koki Holdings Co., Ltd.
    • Hiroyuki HANAWA
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    BATTERY PACK, AND ELECTRIC APPLIANCE USING BATTERY PACK
    • Publication number 20190260209
    • Publication date Aug 22, 2019
    • Koki Holdings Co., Ltd.
    • Tomomasa NISHIKAWA
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    POWER SUPPLY DEVICE AND ELECTRIC DEVICE
    • Publication number 20190140567
    • Publication date May 9, 2019
    • Koki Holdings Co., Ltd.
    • Hayato YAMAGUCHI
    • B24 - GRINDING POLISHING
  • Information Patent Application

    PORTABLE ELECTRIC CUTTER
    • Publication number 20180021865
    • Publication date Jan 25, 2018
    • Hitachi Koki Co., Ltd.
    • Hayato YAMAGUCHI
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    ELECTRIC WORKING MACHINE
    • Publication number 20150041167
    • Publication date Feb 12, 2015
    • Hitachi Koki Co., Ltd.
    • Hayato Yamaguchi
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    PORTABLE ELECTRIC CUTTER
    • Publication number 20150026985
    • Publication date Jan 29, 2015
    • Hitachi Koki Co., Ltd.
    • Hayato Yamaguchi
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    BRUSHLESS MOTOR AND ELECTRIC-POWERED TOOL
    • Publication number 20140084717
    • Publication date Mar 27, 2014
    • Hitachi Koki Co., Ltd.
    • Hayato Yamaguchi
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Application

    Power Tool Having Display That Displays Residual Capacity Of Battery
    • Publication number 20140028223
    • Publication date Jan 30, 2014
    • Hitachi Koki Co., Ltd.
    • Kenichirou Yoshida
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    IMPACT TOOL
    • Publication number 20130333910
    • Publication date Dec 19, 2013
    • HITACHI KOKI CO., LTD.,
    • Hideyuki Tanimoto
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    IMPACT TOOL
    • Publication number 20130062088
    • Publication date Mar 14, 2013
    • Hitachi Koki Co., Ltd.
    • Hironori Mashiko
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    IMPACT TOOL
    • Publication number 20120318550
    • Publication date Dec 20, 2012
    • Hitachi Koki Co., Ltd.
    • Hideyuki Tanimoto
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    IMPACT TOOL
    • Publication number 20120279736
    • Publication date Nov 8, 2012
    • Hitachi Koki Co., Ltd.
    • Hideyuki Tanimoto
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    IMPACT TOOL
    • Publication number 20120199372
    • Publication date Aug 9, 2012
    • HITACHI KOKI CO., LTD.,
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS