DD

David H. Doebel

📍 Iron River, MI: #125 of 361 inventorsTop 35%
🗺 Michigan: #35,034 of 86,293 inventorsTop 45%
Overall (All Time): #2,374,185 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4241726 Concave helix solar concentrator — 1980-12-30
4235225 Semi-tubular parabolic multiple core helix solar concentrator — 1980-11-25