1–2 von 2 Ergebnissen
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    Hydrogen fuel cell tractor

    Freier Zugriff
    LIU SIYANG / MA TIANBAO / LI ZHIMING et al. | Europäisches Patentamt | 2020
    directly converted into electric energy to drive the tractor to operate, no greenhouse gas or pollutant is discharged in the using process ...

    Rooftop greenhouse inside roof infrastructure

    Freier Zugriff
    HALL DAVID R / JENSEN BENJAMIN / TARVER MAX et al. | Europäisches Patentamt | 2017

    A rooftop greenhouse built into a roof infrastructure is disclosed. The roof infrastructure is constructed from conjoining modular

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