DM

David L. Margrave

📍 South Pasadena, CA: #199 of 313 inventorsTop 65%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #4,024,452 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4552170 Line Insertable valve — 1985-11-12