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Akihisa Harada

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  • Nagoya, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Spark plug for internal combustion engine
    • Patent number 5,109,178
    • Issue date Apr 28, 1992
    • NGK Spark Plug Co., Ltd.
    • Mitsutaka Yoshida
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS