DL

Douglas E. Leonberg

📍 Oil City, PA: #140 of 266 inventorsTop 55%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #3,352,636 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7354219 Multi-seal waterproof expansion joint for roadways — 2008-04-08