DH

David P. Hofstad

📍 Sioux Falls, SD: #257 of 532 inventorsTop 50%
🗺 South Dakota: #1,077 of 2,308 inventorsTop 50%
Overall (All Time): #4,064,883 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4314498 Drum having internal double acting control to provide variable pitch — 1982-02-09