FR

Freddie Ray Roberts

📍 Clarksville, TN: #27 of 159 inventorsTop 20%
🗺 Tennessee: #5,688 of 20,272 inventorsTop 30%
Overall (All Time): #1,491,559 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
9624826 Variable compression cylinder head, crankshaft, and piston rod and system thereof 2017-04-18
7104227 Internal combustion engine machine incorporating significant improvements in power, efficiency and emissions control 2006-09-12
4883749 Children's toilet training device with differentiating means Robert W. Lancette 1989-11-28