TREA

Masao Hirabayashi

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  • Kawagoe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Writing instrument with a metal wire point
    • Patent number 4,531,853
    • Issue date Jul 30, 1985
    • Shachihata Industry Co., Ltd.
    • Masao Hirabayashi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ballpoint pen with metallic rod ball seat
    • Patent number 4,529,329
    • Issue date Jul 16, 1985
    • Shachihata Industry Co., Ltd.
    • Masao Hirabayashi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Method of manufacturing vent element
    • Patent number 4,524,899
    • Issue date Jun 25, 1985
    • Tokyo Sintered Metal Co., Ltd.
    • Masao Hirabayashi
    • B22 - CASTING POWDER METALLURGY