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Shizuo Yamanaka

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  • Mitaka-shi, Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Conical nib and writing instrument using the same
    • Patent number 9,233,573
    • Issue date Jan 12, 2016
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Conical NIB and writing instrument using the same
    • Patent number 8,801,314
    • Issue date Aug 12, 2014
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Pen nib
    • Patent number D692055
    • Issue date Oct 22, 2013
    • Shizuo Yamanaka
    • D19 - Office supplies
  • Information Patent Grant

    Pen nib
    • Patent number D690363
    • Issue date Sep 24, 2013
    • Shizuo Yamanaka
    • D19 - Office supplies
  • Information Patent Grant

    Pen nib
    • Patent number D688306
    • Issue date Aug 20, 2013
    • Shizuo Yamanaka
    • D19 - Office supplies
  • Information Patent Grant

    Pen nib
    • Patent number D686282
    • Issue date Jul 16, 2013
    • Shizuo Yamanaka
    • D19 - Office supplies
  • Information Patent Grant

    Conical nib and writing instrument incorporating the same
    • Patent number 8,475,071
    • Issue date Jul 2, 2013
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Conical nib, method of manufacture of the same, and ceramic composi...
    • Patent number 6,652,177
    • Issue date Nov 25, 2003
    • Nobuhiko Shimada
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Penpoint
    • Patent number 5,957,610
    • Issue date Sep 28, 1999
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Conical penpoint method of manufacture
    • Patent number 5,902,064
    • Issue date May 11, 1999
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Process and apparatus for producing molten metal coated steel sheets
    • Patent number 5,587,017
    • Issue date Dec 24, 1996
    • Sumitomo Metal Industries, Ltd.
    • Shizuo Yamanaka
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Writing instrument
    • Patent number D329660
    • Issue date Sep 22, 1992
    • Shizuo Yamanaka
    • D19 - Office supplies
  • Information Patent Grant

    Multiangular pen
    • Patent number 5,015,113
    • Issue date May 14, 1991
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Multiangular pen
    • Patent number 4,986,684
    • Issue date Jan 22, 1991
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Multiangular pen
    • Patent number 4,986,686
    • Issue date Jan 22, 1991
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Multangular pen nib construction
    • Patent number 4,386,867
    • Issue date Jun 7, 1983
    • Shizuo Yamanaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents