DG

Douglas D. Groen

📍 Apple Valley, MN: #10 of 27 inventorsTop 40%
🗺 Minnesota: #695 of 2,841 inventorsTop 25%
Overall (1994): #141,308 of 165,921Top 90%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5369834 Rotary duct cleaning brush device Kenneth W. Witte 1994-12-06