DJ

Douglas E. Johnson

SP Sparton: 1 patents #1 of 5Top 20%
📍 Minneapolis, MN: #22 of 128 inventorsTop 20%
🗺 Minnesota: #156 of 1,035 inventorsTop 20%
Overall (1982): #68,748 of 81,411Top 85%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4338978 Lead chloride battery plate John L. Devitt, Robert S. Willard 1982-07-13