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James Douglas Sparling

📍 Denver, CO: #57 of 271 inventorsTop 25%
🗺 Colorado: #1,055 of 3,647 inventorsTop 30%
Overall (2011): #272,793 of 364,097Top 75%
1
Patents 2011

Issued Patents 2011

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7938097 Low speed valveless horizontally opposed piston rotary internal combustion engine 2011-05-10