DJ

Douglas Johns

📍 Topanga, CA: #54 of 111 inventorsTop 50%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,118,835 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7677210 Rotating barrel type internal combustion engine Lawrence C. Chasin, Aaron Barere, Christopher E. Gardner 2010-03-16
7210429 Rotating positive displacement engine 2007-05-01