TREA

Shintaro Hotta

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Music card system
    • Patent number 4,614,144
    • Issue date Sep 30, 1986
    • Oki Electric Industry Co., Ltd.
    • Iwao Sagara
    • G10 - MUSICAL INSTRUMENTS ACOUSTICS