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Ching-Da Chen

Overall (All Time): #2,176,513 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6845967 Control device for an oil drain valve — 2005-01-25
6609699 Oil drain valve — 2003-08-26