TREA

Ziqing Zhang

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Speaker system for use in an automobile vehicle
    • Patent number 5,966,453
    • Issue date Oct 12, 1999
    • Pioneer Electronic Corporation
    • Shinji Koyano
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Line source speaker system
    • Patent number 5,953,432
    • Issue date Sep 14, 1999
    • Pioneer Electronic Corporation
    • Hirofumi Yanagawa
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE