TREA

Noriyuki Hiyama

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ear speaker device
    • Patent number 8,538,059
    • Issue date Sep 17, 2013
    • Sony Corporation
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Ear speaker device
    • Patent number 8,175,316
    • Issue date May 8, 2012
    • Sony Corporation
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    EAR SPEAKER DEVICE
    • Publication number 20120177206
    • Publication date Jul 12, 2012
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Ear speaker device
    • Publication number 20080253604
    • Publication date Oct 16, 2008
    • Makoto Yamagishi
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE