TREA

Tsuyoshi Hayakawa

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ink jet head block
    • Patent number 5,581,288
    • Issue date Dec 3, 1996
    • Seiko Precision Inc.
    • Yukiharu Shimizu
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Ink jet head
    • Patent number 5,534,903
    • Issue date Jul 9, 1996
    • Seikosha Co., Ltd.
    • Tsuyoshi Hayakawa
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Serial printer
    • Patent number 5,344,245
    • Issue date Sep 6, 1994
    • Seikosha Co., Ltd.
    • Akio Tajima
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Dot printer
    • Patent number 5,336,004
    • Issue date Aug 9, 1994
    • Seikosha Co., Ltd.
    • Hiroyuki Harada
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS