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David J. Youngren

📍 Robbinsdale, MN: #1 of 7 inventorsTop 15%
🗺 Minnesota: #407 of 2,022 inventorsTop 25%
Overall (1989): #121,220 of 140,708Top 90%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4875760 Reflective prism assembly John H. Youngren 1989-10-24