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Chun-Guang Dong

📍 Qingdao, CN: #946 of 2,087 inventorsTop 50%
Overall (All Time): #3,880,928 of 4,157,543Top 95%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5032259 Friction-reducing lubricating-oil filter for internal combustion engine Qi He 1991-07-16