DF

Douglas E. Fessel

📍 Waterville, MN: #7 of 10 inventorsTop 70%
🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%
Overall (All Time): #2,215,667 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6464865 Wastewater dispersal system Gary A. Tipton 2002-10-15
6413427 Nitrogen reduction wastewater treatment system Gary A. Tipton 2002-07-02