Inventor · disambiguated record
Marvin Gearhart
Also filed as: GEARHART MARVIN
5 granted patents·2 pending applications·515 citations·filing 1974–2009
86Inventor score
Technology areasE21B
Top patents by PatentIndex Score
7 records- 0194US3964556ADownhole signaling systemGEARHART OWEN INDUSTRIES·Filed 1974·Granted Jun 22, 1976·176 cites·17 claims
- 0286US5289889ARoller cone core bit with spiral stabilizersGEARHART MARVIN·Filed 1993·Granted Mar 1, 1994·158 cites·5 claims
- 0381US5873420AAir and mud control system for underbalanced drillingFiled 1997·Granted Feb 23, 1999·103 cites·36 claims
- 0476US7673705B2Compartmentalized MWD tool with isolated pressure compensatorGEARHART COMPANIES INC·Filed 2008·Granted Mar 9, 2010·28 cites·10 claims
- 0564US5831549ATelemetry system involving gigahertz transmission in a gas filled tubular waveguideFiled 1997·Granted Nov 3, 1998·50 cites·24 claims
- 0633US2006196699A1Modular kerfing drill bitESTES ROY·Filed 2005·Application pending·0 cites
- 0732US2010025111A1Direct Drive MWD ToolGEARHART MARVIN·Filed 2009·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Marvin Gearhart 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 →