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Shinki Ohtsu

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  • Ibaraki-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Oil pulse tool
    • Patent number 8,925,645
    • Issue date Jan 6, 2015
    • Hitachi Koki Co., Ltd.
    • Tetsuhiro Harada
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Motorized cutter, motorized cutter with wheels, and cutting method
    • Patent number 8,926,024
    • Issue date Jan 6, 2015
    • Hitachi Koki Co., Ltd.
    • Yukihiro Shima
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Vibration drill unit
    • Patent number 8,672,049
    • Issue date Mar 18, 2014
    • Hitachi Koki Co., Ltd.
    • Junichi Tokairin
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Two cycle engine and two cycle engine tool
    • Patent number 8,499,730
    • Issue date Aug 6, 2013
    • Hitachi Koki Co., Ltd.
    • Toshinori Yasutomi
    • Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
  • Information Patent Grant

    Two cycle engine and tool
    • Patent number 8,439,005
    • Issue date May 14, 2013
    • Hitachi Koki Co., Ltd.
    • Toshinori Yasutomi
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Dust collection cover attachable to cutter
    • Patent number 8,371,034
    • Issue date Feb 12, 2013
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Fuel, gas, combustion type power tool driven by the fuel gas, and c...
    • Patent number 8,205,777
    • Issue date Jun 26, 2012
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Centrifugal machine having a vibration preventing mechanism
    • Patent number 7,883,456
    • Issue date Feb 8, 2011
    • Hitachi Koki Co., Ltd.
    • Shoji Kusumoto
    • B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...
  • Information Patent Grant

    Electrically driven flywheel-fastener driver
    • Patent number 7,789,281
    • Issue date Sep 7, 2010
    • Hitachi Koki Co., Ltd.
    • Hideyuki Tanimoto
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Electrical power tool
    • Patent number 7,766,096
    • Issue date Aug 3, 2010
    • Hitachi Koki Co., Ltd.
    • Shinichirou Satou
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Power tool having a vibration isolating handle
    • Patent number 7,721,818
    • Issue date May 25, 2010
    • Hitachi Koki Co., Ltd.
    • Hiroto Inagawa
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Impact drill
    • Patent number 7,658,238
    • Issue date Feb 9, 2010
    • Hitachi Koki Co., Ltd.
    • Jyunichi Toukairin
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Combustion-type power tool
    • Patent number 7,500,587
    • Issue date Mar 10, 2009
    • Hitachi Koki Co., Ltd.
    • Yoshitaka Akiba
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Power tool
    • Patent number 7,455,121
    • Issue date Nov 25, 2008
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Impact tool
    • Patent number 7,416,031
    • Issue date Aug 26, 2008
    • Hitachi Koki Co., Ltd.
    • Takuhiro Murakami
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Motor-driven tool
    • Patent number 7,323,796
    • Issue date Jan 29, 2008
    • Hitachi Koki Co., Ltd.
    • Katsuhiro Oomori
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Combustion-type power tool having ignition proof arrangement
    • Patent number 7,305,940
    • Issue date Dec 11, 2007
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Combustion-type power tool having ignition proof arrangement
    • Patent number 7,293,541
    • Issue date Nov 13, 2007
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Combustion type power tool facilitating cleaning to internal cleani...
    • Patent number 7,261,071
    • Issue date Aug 28, 2007
    • Hitachi Koki Co., Ltd.
    • Shinki Ohtsu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Pulse torque generator and power tool having the same
    • Patent number 7,216,723
    • Issue date May 15, 2007
    • Hitachi Koki Co., Ltd.
    • Shinki Ohtsu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Impact drill
    • Patent number 7,213,659
    • Issue date May 8, 2007
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Combustion-type power tool
    • Patent number 7,194,988
    • Issue date Mar 27, 2007
    • Hitachi Koki Co., Ltd.
    • Yasuki Ohmori
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Portable electric router having radial fan
    • Patent number 7,171,997
    • Issue date Feb 6, 2007
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Combustion-type power tool
    • Patent number 7,121,442
    • Issue date Oct 17, 2006
    • Hitachi Koki Co., Ltd.
    • Yoshitaka Akiba
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Impact drill
    • Patent number 7,093,670
    • Issue date Aug 22, 2006
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Impact drill
    • Patent number 7,073,605
    • Issue date Jul 11, 2006
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Power tool
    • Patent number 7,048,075
    • Issue date May 23, 2006
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Combustion type power tool facilitating cleaning to internal cleani...
    • Patent number 7,044,090
    • Issue date May 16, 2006
    • Hitachi Koki Co., Ltd.
    • Shinki Ohtsu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Combustion type power tool
    • Patent number 6,951,194
    • Issue date Oct 4, 2005
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Power tool having air discharge windows
    • Patent number 6,779,612
    • Issue date Aug 24, 2004
    • Hitachi Koki Co., Ltd.
    • Tomomasa Nishikawa
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

  • Information Patent Application

    MOTORIZED CUTTER, MOTORIZED CUTTER WITH WHEELS, AND CUTTING METHOD
    • Publication number 20110303060
    • Publication date Dec 15, 2011
    • Yukihiro Shima
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    OIL PULSE TOOL
    • Publication number 20110214894
    • Publication date Sep 8, 2011
    • Hitachi Koki Co., Ltd.
    • Tetsuhiro Harada
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    TWO CYCLE ENGINE AND TWO CYCLE ENGINE TOOL
    • Publication number 20100037877
    • Publication date Feb 18, 2010
    • Hitachi Koki Co., Ltd.
    • Toshinori YASUTOMI
    • Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
  • Information Patent Application

    TWO CYCLE ENGINE AND TOOL
    • Publication number 20100037875
    • Publication date Feb 18, 2010
    • Hitachi Koki Co., Ltd.
    • Toshinori YASUTOMI
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Application

    DUST COLLECTION COVER ATTACHABLE TO CUTTER
    • Publication number 20090114072
    • Publication date May 7, 2009
    • Tomomasa Nishikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    ELECTRICAL POWER TOOL
    • Publication number 20090095499
    • Publication date Apr 16, 2009
    • Shinichirou Satou
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    ELECTRIC FASTENER DRIVER
    • Publication number 20090039136
    • Publication date Feb 12, 2009
    • Hideyuki Tanimoto
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    CENTRIFUGAL MACHINE
    • Publication number 20090023571
    • Publication date Jan 22, 2009
    • Shoji KUSUMOTO
    • B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...
  • Information Patent Application

    IMPACT TOOL
    • Publication number 20070179328
    • Publication date Aug 2, 2007
    • Takuhiro Murakami
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact tool
    • Publication number 20070034398
    • Publication date Feb 15, 2007
    • Takuhiro Murakami
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion-type power tool
    • Publication number 20070034661
    • Publication date Feb 15, 2007
    • Yoshitaka Akiba
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Vibration drill unit
    • Publication number 20070007024
    • Publication date Jan 11, 2007
    • Junichi Tokairin
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact tool
    • Publication number 20060254789
    • Publication date Nov 16, 2006
    • Takuhiro Murakami
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact tool
    • Publication number 20060254786
    • Publication date Nov 16, 2006
    • Takuhiro Murakami
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion type power tool facilitating cleaning to internal cleani...
    • Publication number 20060225674
    • Publication date Oct 12, 2006
    • Shinki Ohtsu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion-type power tool having ignition proof arrangement
    • Publication number 20060185629
    • Publication date Aug 24, 2006
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion-type power tool having ignition proof arrangement
    • Publication number 20060186165
    • Publication date Aug 24, 2006
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Pulse torque generator and power tool having the same
    • Publication number 20060137887
    • Publication date Jun 29, 2006
    • Shinki Ohtsu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Fuel, gas, combustion type power tool driven by the fuel gas, and c...
    • Publication number 20060129009
    • Publication date Jun 15, 2006
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Power tool
    • Publication number 20060113098
    • Publication date Jun 1, 2006
    • Hiroto Inagawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion-type power tool
    • Publication number 20060102111
    • Publication date May 18, 2006
    • Yasuki Ohmori
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion-type power tool providing specific spark energy
    • Publication number 20060042574
    • Publication date Mar 2, 2006
    • Tomomasa Nishikawa
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion-type power tool
    • Publication number 20050229598
    • Publication date Oct 20, 2005
    • Yoshitaka Akiba
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact drill
    • Publication number 20050194165
    • Publication date Sep 8, 2005
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact drill
    • Publication number 20050194164
    • Publication date Sep 8, 2005
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Power tool
    • Publication number 20050061521
    • Publication date Mar 24, 2005
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Combustion type power tool facilitating cleaning to internal cleani...
    • Publication number 20050035171
    • Publication date Feb 17, 2005
    • Shinki Ohtsu
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact drill
    • Publication number 20050028995
    • Publication date Feb 10, 2005
    • Hitachi Koki Co., Ltd.
    • Takuma Saito
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Impact drill
    • Publication number 20050028996
    • Publication date Feb 10, 2005
    • Hitachi Koki Co., Ltd.
    • Jyunichi Toukairin
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Application

    Portable electric router having radial fan
    • Publication number 20040250890
    • Publication date Dec 16, 2004
    • Tomomasa Nishikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR