TREA

Jyoji Hukuda

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fluid flow control speaker system
    • Patent number 4,194,095
    • Issue date Mar 18, 1980
    • Sony Corporation
    • Toshitada Doi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE