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Chih-Ming Chang

📍 Tainan, TW: #57 of 212 inventorsTop 30%
Overall (2002): #244,028 of 266,432Top 95%
1
Patents 2002

Issued Patents 2002

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6488136 Ratchet wheel structure of ratcheting wrench — 2002-12-03