DH

David Allan Hultman

UM University of Minnesota: 1 patents #13 of 85Top 20%
📍 Cambridge, MN: #2 of 3 inventorsTop 70%
🗺 Minnesota: #813 of 3,156 inventorsTop 30%
Overall (1997): #163,193 of 185,788Top 90%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5670711 Portable rock strength evaluation device Emmanuel Detournay, Andrew Drescher 1997-09-23