TREA

Tomotsugu Minamikawa

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Earphone
    • Patent number D698762
    • Issue date Feb 4, 2014
    • Sony Corporation
    • Qi Zheng
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Earphone
    • Patent number D682257
    • Issue date May 14, 2013
    • Sony Corporation
    • Qi Zheng
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Earphone
    • Patent number D669057
    • Issue date Oct 16, 2012
    • Sony Corporation
    • Qi Zheng
    • D14 - Recording, communication, or information retrieval equipment