HD

Hal I. Dunham

DI Dresser Industries: 1 patents #301 of 787Top 40%
📍 Marion, OH: #63 of 122 inventorsTop 55%
🗺 Ohio: #42,657 of 73,341 inventorsTop 60%
Overall (All Time): #4,035,970 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4453770 Mining method and system Thomas H. Dalrymple 1984-06-12