RB

Roger O. Birkholz

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Duluth, MN: #165 of 317 inventorsTop 55%
🗺 Minnesota: #32,449 of 52,454 inventorsTop 65%
Overall (All Time): #4,026,064 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4558276 Device and method for sensing electric current in a conductor Leon J. Comeau 1985-12-10