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William L. Powis

📍 Lethbridge, CA: #67 of 172 inventorsTop 40%
Overall (All Time): #3,870,674 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4995207 Air-vapor barrier continuity device — 1991-02-26