Inventor · disambiguated record
Lionel R. Marais
Also filed as: MARAIS LIONEL · MARAIS LIONEL R
3 granted patents·123 citations·filing 1978–1983
75Inventor score
Technology areasE21B
Files withPETROLES CIE FRANCAISE3
Top patents by PatentIndex Score
3 records- 0184US4223747ADrilling using reverse circulationPETROLES CIE FRANCAISE·Filed 1978·Granted Sep 23, 1980·71 cites·7 claims
- 0275US4194567AMethod and apparatus for balancing pressures in an oil wellPETROLES CIE FRANCAISE·Filed 1978·Granted Mar 25, 1980·42 cites·18 claims
- 0335US4520886ARotary drilling tool with percussion devicePETROLES CIE FRANCAISE·Filed 1983·Granted Jun 4, 1985·10 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Lionel R. Marais files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →