Inventor

GEARHART MARVIN

US5 patents

⚠️ This page may combine multiple inventors who share the name “GEARHART MARVIN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

(unassigned)

2 patents

US5873420AFeb 23, 1999

Air and mud control system for underbalanced drilling

103 citations95

US5831549ANov 3, 1998

Telemetry system involving gigahertz transmission in a gas filled tubular waveguide

50 citations89

GEARHART OWEN INDUSTRIES

1 patent

US3964556AJun 22, 1976

Downhole signaling system

GEARHART OWEN INDUSTRIES176 citations96

GEARHART MARVIN

1 patent

US5289889AMar 1, 1994

Roller cone core bit with spiral stabilizers

GEARHART MARVIN158 citations91

GEARHART COMPANIES INC

1 patent

US7673705B2Mar 9, 2010

Compartmentalized MWD tool with isolated pressure compensator

GEARHART COMPANIES INC28 citations81