TREA

Kazuo Sakai

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  • Saitama, JP
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Patents Grantslast 30 patents

  • 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

    Ink ribbon regenerating device
    • Patent number 5,190,385
    • Issue date Mar 2, 1993
    • Pentel Kabushiki Kaisha
    • Tetuo Taguchi
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS