TREA

Yasuo Hattori

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  • Hachioji, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hand microphone for transcriber
    • Patent number D299336
    • Issue date Jan 10, 1989
    • Olympus Optical Co., Ltd.
    • Akira Osanai
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Audio cassette recorder and transcriber
    • Patent number D297933
    • Issue date Oct 4, 1988
    • Olympus Optical Co., Ltd.
    • Akira Osanai
    • D14 - Recording, communication, or information retrieval equipment