DH

Donald W. Hannu

📍 Mandan, ND: #16 of 55 inventorsTop 30%
🗺 North Dakota: #797 of 2,395 inventorsTop 35%
Overall (All Time): #2,221,547 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6171398 Apparatus for coating a conduit surface — 2001-01-09
5516053 Welded metal hardfacing pattern for cone crusher surfaces — 1996-05-14