DD

David Doan

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 DuBois, PA: #31 of 123 inventorsTop 30%
🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%
Overall (All Time): #2,217,928 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6447117 Eyeglass lens mounting system Rene Estrada 2002-09-10
5501478 Occupant propelled three wheeled vehicle — 1996-03-26