DC

David William Classen

📍 Manassas, VA: #166 of 524 inventorsTop 35%
🗺 Virginia: #12,642 of 34,511 inventorsTop 40%
Overall (All Time): #2,020,962 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D733932 Concrete step — 2015-07-07
8935894 Concrete step — 2015-01-20