DF

Donald S. Fiegen

TT The Trane: 1 patents #21 of 54Top 40%
📍 Hibbing, MN: #33 of 73 inventorsTop 50%
🗺 Minnesota: #32,449 of 52,454 inventorsTop 65%
Overall (All Time): #4,009,850 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4498220 Method for pre-expanding heat exchanger tube Chester D. Ware 1985-02-12