Umbrella with luminous umbrella fabric
LIU PENGJUN, ZHENG YONGCHENG, WANG GUANTING, LYU ZHUOYIN, LIU DONGXIN
Year of Publication 19.11.2019
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Year of Publication 19.11.2019
Patent
Umbrella with acid-base indication function
LIU PENGJUN, ZHENG YONGCHENG, WANG GUANTING, LYU ZHUOYIN, LIU DONGXIN
Year of Publication 05.11.2019
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Year of Publication 05.11.2019
Patent
Acid-base indication function umbrella
LIU PENGJUN, ZHENG YONGCHENG, WANG GUANTING, LYU ZHUOYIN, LIU DONGXIN
Year of Publication 10.05.2019
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Year of Publication 10.05.2019
Patent