LM

Lionel R. Marais

CP Compagnie Francaise Des Petroles: 3 patents #10 of 97Top 15%
Overall (All Time): #1,679,902 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4520886 Rotary drilling tool with percussion device — 1985-06-04
4223747 Drilling using reverse circulation — 1980-09-23
4194567 Method and apparatus for balancing pressures in an oil well — 1980-03-25