DC

Der-Feng Chang

📍 Guoxing Township, TW: #1 of 5 inventorsTop 20%
Overall (1994): #143,089 of 165,921Top 90%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5295607 Trash tank — 1994-03-22