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Chung Nan Chang

PS Polar Spring: 1 patents #1 of 1Top 100%
📍 Foster City, CA: #7 of 18 inventorsTop 40%
🗺 California: #2,144 of 10,592 inventorsTop 25%
Overall (1989): #126,876 of 140,708Top 95%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4799945 Dual freezing chamber system and method for water purification — 1989-01-24