TREA

Katsuhiko Iimura

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Speaker system
    • Patent number 5,781,642
    • Issue date Jul 14, 1998
    • Matsushita Electric Industrial Co., Ltd.
    • Shoji Tanaka
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Bass reproduction speaker apparatus
    • Patent number 5,588,065
    • Issue date Dec 24, 1996
    • Masushita Electric Industrial Co.
    • Shoji Tanaka
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE