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Shigeo Oka

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Cap for a writing instrument
    • Patent number D584357
    • Issue date Jan 6, 2009
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Mechanical pencil
    • Patent number D572756
    • Issue date Jul 8, 2008
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Marking pen
    • Patent number D547801
    • Issue date Jul 31, 2007
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Ball point pen
    • Patent number D499139
    • Issue date Nov 30, 2004
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Ball point pen
    • Patent number D490105
    • Issue date May 18, 2004
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Cap for a writing instrument
    • Patent number D460486
    • Issue date Jul 16, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Cap for a writing instrument
    • Patent number D460114
    • Issue date Jul 9, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Cap for a writing instrument
    • Patent number D459757
    • Issue date Jul 2, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Ball point pen
    • Patent number D458965
    • Issue date Jun 18, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Ballpoint pen cap
    • Patent number D458966
    • Issue date Jun 18, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Correction pen
    • Patent number D456844
    • Issue date May 7, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Clip for a writing instrument
    • Patent number D455179
    • Issue date Apr 2, 2002
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Case for refillable leads for a mechanical pencil
    • Patent number D449073
    • Issue date Oct 9, 2001
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Container for lead refill
    • Patent number 6,179,124
    • Issue date Jan 30, 2001
    • Pentel K.K.
    • Shigeo Oka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Correction pen
    • Patent number D428441
    • Issue date Jul 18, 2000
    • Pentel Kabushiki Kaisha
    • Toshihiro Isobe
    • D19 - Office supplies
  • Information Patent Grant

    Ball point pen
    • Patent number D421625
    • Issue date Mar 14, 2000
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Ball point pen
    • Patent number D390873
    • Issue date Feb 17, 1998
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Holder tube for writing instrument
    • Patent number 5,558,452
    • Issue date Sep 24, 1996
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Shaft for a writing instrument
    • Patent number D363310
    • Issue date Oct 17, 1995
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Housing for a ballpoint pen tip
    • Patent number D357700
    • Issue date Apr 25, 1995
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Ball point pen
    • Patent number D351416
    • Issue date Oct 11, 1994
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Cap for a writing instrument
    • Patent number D351417
    • Issue date Oct 11, 1994
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Computer ribbon reinking system
    • Patent number D344748
    • Issue date Mar 1, 1994
    • Pentel Kabushiki Kaisha
    • Keiichi Emura
    • D18 - Printing and office machinery
  • Information Patent Grant

    Ball point pen
    • Patent number D338038
    • Issue date Aug 3, 1993
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument
    • Patent number D314978
    • Issue date Feb 26, 1991
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument
    • Patent number D312837
    • Issue date Dec 11, 1990
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument
    • Patent number D312659
    • Issue date Dec 4, 1990
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument clip
    • Patent number D308697
    • Issue date Jun 19, 1990
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies
  • Information Patent Grant

    Writing instrument with plural elements
    • Patent number 4,902,151
    • Issue date Feb 20, 1990
    • Pentel Kabushiki Kaisha
    • Katsuo Asano
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Pen cap or similar article
    • Patent number D305551
    • Issue date Jan 16, 1990
    • Pentel Kabushiki Kaisha
    • Shigeo Oka
    • D19 - Office supplies