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Zhuangdou Zhang

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Shangqiu City, CN: #5 of 19 inventorsTop 30%
Overall (All Time): #1,156,891 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
11040890 Tannery process with effluent recycling — 2021-06-22
10501336 Tannery process with effluent recycling — 2019-12-10
10260115 Leather production using waste liquids — 2019-04-16
9776887 Tannery process with effluent recycling — 2017-10-03