IN

Ivan L. Nelson

📍 Sibley, IA: #5 of 20 inventorsTop 25%
🗺 Iowa: #6,094 of 15,303 inventorsTop 40%
Overall (All Time): #2,328,971 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4809788 Mast assembly for percussive and auger drilling — 1989-03-07
4262754 Rotary drilling device with pivoting drill head assembly — 1981-04-21