DB

Douglas Biggins

📍 Rapid City, SD: #143 of 295 inventorsTop 50%
🗺 South Dakota: #1,077 of 2,308 inventorsTop 50%
Overall (All Time): #3,562,486 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6474673 Trailer hitch conversion apparatus — 2002-11-05