RC

Ralph E. Coffman

DI Dresser Industries: 1 patents #301 of 787Top 40%
📍 Bucyrus, OH: #17 of 28 inventorsTop 65%
🗺 Ohio: #42,657 of 73,341 inventorsTop 60%
Overall (All Time): #3,857,557 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5140761 Dragline bucket line protection device Joseph B. Kumpf 1992-08-25