TREA

Kazuo Azami

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  • Saitama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Speaker apparatus
    • Patent number 5,835,612
    • Issue date Nov 10, 1998
    • Sony Corporation
    • Masao Fujihira
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Transducer having two ducts
    • Patent number 5,115,473
    • Issue date May 19, 1992
    • Sony Corporation
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE