DR

Donald G. Ralston

FI Fisher Controls International: 1 patents #250 of 440Top 60%
📍 Conrad, IA: #9 of 14 inventorsTop 65%
🗺 Iowa: #8,735 of 15,303 inventorsTop 60%
Overall (All Time): #3,490,510 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6793197 Butterfly valve Charles L. DePenning, Hans D. Baumann 2004-09-21