TREA

Ryoichi Endoh

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  • Hamamatsu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for drilling pronunciation
    • Patent number 5,142,657
    • Issue date Aug 25, 1992
    • Kabushiki Kaisha Kawai Gakki Seisakusho
    • Sadaaki Ezawa
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Apparatus for drilling pronunciation
    • Patent number 4,969,194
    • Issue date Nov 6, 1990
    • Kabushiki Kaisha Kawai Gakki Seisakusho
    • Sadaaki Ezawa
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS