DH

Douglas J. Hennenfent

📍 Minneapolis, MN: #41 of 227 inventorsTop 20%
🗺 Minnesota: #407 of 2,022 inventorsTop 25%
Overall (1989): #119,562 of 140,708Top 85%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4874922 Granule vise for manufacturing a magnetic head core with a glass fillet adjacent the inner edge of the gap Timothy W. Vadnais 1989-10-17