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Patents/Inventors

Jingguan Du

TianjinCN4 patents

4 Patents

  • USD11217702026
    Refrigerator Filter

    TIANJIN YUANZHI ENVIRONMENTAL TECHNOLOGY Co. Ltd.

    0 cites
  • USD11033362025
    Water Filter

    TIANJIN YUANZHI ENVIRONMENTAL PROTECTION TECHNOLOGY CO., Ltd

    0 cites
  • USD10830242025
    Refrigerator Filter

    Tianjin Yuanzhi Environmental Technology Co. Ltd.

    0 cites
  • USD10830252025
    Refrigerator Filter

    Tianjin Yuanzhi Environmental Technology Co. Ltd.

    0 cites