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Masayuki Kawasaki

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Patents Grantslast 30 patents

  • Information Patent Grant

    Pressure fluctuation buffering mechanism and applicator
    • Patent number 9,969,205
    • Issue date May 15, 2018
    • CHEMICOS CREATIONS LTD.
    • Masayuki Kawasaki
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument
    • Patent number 9,796,207
    • Issue date Oct 24, 2017
    • V SPARK CO., LTD.
    • Masayuki Kawasaki
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Reactive oxygen species measuring device
    • Patent number 8,298,387
    • Issue date Oct 30, 2012
    • Makoto Yuasa
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Ink storage container
    • Patent number 8,070,273
    • Issue date Dec 6, 2011
    • Jit Co., Ltd.
    • Masayuki Kawasaki
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Knock-type liquid applicator
    • Patent number 5,749,665
    • Issue date May 12, 1998
    • Pentel Kabushiki Kaisha
    • Naoki Kato
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Marker
    • Patent number D371388
    • Issue date Jul 2, 1996
    • Pentel Kabushiki Kaisha
    • Kunio Ito
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument
    • Patent number 5,352,051
    • Issue date Oct 4, 1994
    • Pentel Kabushiki Kaisha
    • Takashi Tamura
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument
    • Patent number 5,217,313
    • Issue date Jun 8, 1993
    • Pentel Kabushiki Kaisha
    • Takashi Tamura
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Nib for a writing instrument
    • Patent number 5,096,322
    • Issue date Mar 17, 1992
    • Pentel Kabushiki Kaisha
    • Hiroyuki Shiga
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Nib for writing instruments
    • Patent number 4,824,271
    • Issue date Apr 25, 1989
    • Pental Kabushiki Kaisha
    • Masamitsu Nagahama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    PRESSURE FLUCTUATION BUFFERING MECHANISM AND APPLICATOR
    • Publication number 20160250884
    • Publication date Sep 1, 2016
    • V SPARK Co., Ltd.
    • Masayuki KAWASAKI
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    KNOCK-TYPE APPLICATOR
    • Publication number 20160068006
    • Publication date Mar 10, 2016
    • V SPARK Co., Ltd.
    • Masayuki KAWASAKI
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    WRITING INSTRUMENT
    • Publication number 20150151565
    • Publication date Jun 4, 2015
    • V SPARK Co., Ltd.
    • Masayuki Kawasaki
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    INK STORAGE CONTAINER
    • Publication number 20090122121
    • Publication date May 14, 2009
    • Masayuki Kawasaki
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Application

    Reactive oxygen species measuring device
    • Publication number 20060289313
    • Publication date Dec 28, 2006
    • Makoto Yuasa
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE