DL

David W. Louwenaar

📍 Aurora, CO: #411 of 1,215 inventorsTop 35%
🗺 Colorado: #17,029 of 40,980 inventorsTop 45%
Overall (All Time): #2,351,535 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4497145 Solar warming hut — 1985-02-05
4287683 Solar shield — 1981-09-08