DK

Donald J. Kerfeld

📍 Windom, MN: #14 of 98 inventorsTop 15%
🗺 Minnesota: #156 of 1,035 inventorsTop 20%
Overall (1982): #68,732 of 81,411Top 85%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4363844 Metallized information carrying discs Terry W. Lewis, Roger Jeffrey Anderson 1982-12-14