RR

Roger E. Ritchie

SI Scientific Drilling International: 1 patents #39 of 71Top 55%
📍 Santa Ana, CA: #797 of 1,362 inventorsTop 60%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #3,969,996 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4649344 Test circuit for detector used in well bore Helmut Moll 1987-03-10