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