RD

Roger J. Duffek

HI Hamilton Industries: 1 patents #8 of 21Top 40%
📍 Two Rivers, WI: #36 of 59 inventorsTop 65%
🗺 Wisconsin: #23,834 of 40,088 inventorsTop 60%
Overall (All Time): #3,963,167 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4785722 Fume hood with step baffles Norman K. Dollhopf 1988-11-22