TREA

Katsumi Hirata

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical pulse testing device
    • Patent number 6,954,264
    • Issue date Oct 11, 2005
    • Yokogawa Electric Corporation
    • Tetsuya Araki
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Optical fiber measuring apparatus
    • Patent number 6,839,130
    • Issue date Jan 4, 2005
    • Ando Electric Co., Ltd.
    • Tetsuya Araki
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Optical pulse testing device
    • Patent number 6,771,361
    • Issue date Aug 3, 2004
    • Kyusyo Ando Electric Company Limited
    • Tetsuya Araki
    • G01 - MEASURING TESTING

Patents Applicationslast 30 patents

  • Information Patent Application

    Optical pulse testing device
    • Publication number 20040223136
    • Publication date Nov 11, 2004
    • Kyusyu Ando Electric Company Limited
    • Tetsuya Araki
    • G01 - MEASURING TESTING
  • Information Patent Application

    Optical pulse testing device
    • Publication number 20030160952
    • Publication date Aug 28, 2003
    • Tetsuya Araki
    • G01 - MEASURING TESTING
  • Information Patent Application

    Optical fiber measuring apparatus
    • Publication number 20030025900
    • Publication date Feb 6, 2003
    • Tetsuya Araki
    • G01 - MEASURING TESTING