DD

Donald A. Drew

📍 Calhan, CO: #5 of 9 inventorsTop 60%
🗺 Colorado: #24,093 of 40,980 inventorsTop 60%
Overall (All Time): #3,840,063 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5271194 Mechanism for preventing snow from sliding off roofs — 1993-12-21