TREA

Takefumi Daido

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Transmitter for a headphone
    • Patent number D325578
    • Issue date Apr 21, 1992
    • Sony Corporation
    • Takefumi Daido
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Headphone
    • Patent number D319241
    • Issue date Aug 20, 1991
    • Sony Corporation
    • Takefumi Daido
    • D14 - Recording, communication, or information retrieval equipment