Douglas Biggins

📍 Rapid City, SD: #2 of 12 inventorsTop 20%

🗺 South Dakota: #27 of 126 inventorsTop 25%

Overall (2002): #79,604 of 266,432Top 30%

Patents 2002

Issued Patents 2002

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
6474673	Trailer hitch conversion apparatus	—	2002-11-05