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Saburo Kobayashi

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  • Kawagoe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dual refill-type writing utensil
    • Patent number 5,056,947
    • Issue date Oct 15, 1991
    • Kotobuki & Co., Ltd.
    • Masuo Kubota
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Lead cartridge opening and closing unit
    • Patent number 4,836,703
    • Issue date Jun 6, 1989
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES