DW

De Qing Wang

📍 Xicheng District, CN: #2 of 7 inventorsTop 30%
Overall (All Time): #3,654,183 of 4,157,543Top 90%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5924353 Durable oil well pump of fitting ceramics cylinder — 1999-07-20