1–6 of 6 hits
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    Multi-rotor unmanned aerial vehicle with cathode open type air-cooled fuel cell power system

    Free access
    ZHAO CHEN / ZHANG JINGRAN | European Patent Office | 2023

    AIRCRAFT ENGINE EMISSIONS QUANTITY MEASUREMENT METHOD AND APPARATUS

    Free access
    WU YE / ZHANG JINGRAN / ZHANG SHAOJUN et al. | European Patent Office | 2021

    Method and device for measuring emission load of aircraft engine emissions

    Free access
    WU YE / ZHANG JINGRAN / ZHANG SHAOJUN et al. | European Patent Office | 2020

    Field lineation robot with boundary rope adjustment function and method

    Free access
    ZHAO YANZHI / LI ERWEI / ZHANG JINGRAN et al. | European Patent Office | 2023

    Hinge type openable and closable bow

    Free access
    CHEN NUO / HE FEI / WEI XINHUA et al. | European Patent Office | 2023