Assignee
GEARHART IND INC
US·32 granted patents·1,091 citations·filing 1979–1986
Top patents by PatentIndex Score
32 records- 0197US4502010AApparatus including a magnetometer having a pair of U-shaped cores for extended lateral range electrical conductivity loggingGEARHART IND INC·Filed 1982·Granted Feb 26, 1985·103 cites·16 claims
- 0291US4339948AWell formation test-treat-test apparatus and methodGEARHART IND INC·Filed 1980·Granted Jul 20, 1982·100 cites·10 claims
- 0389US4619318AChemical cutting method and apparatusGEARHART IND INC·Filed 1984·Granted Oct 28, 1986·91 cites·14 claims
- 0488US4491178AThrough tubing bridge plugGEARHART IND INC·Filed 1983·Granted Jan 1, 1985·82 cites·8 claims
- 0587US4603578ASide entry sub with tension release wireline cable clampGEARHART IND INC·Filed 1984·Granted Aug 5, 1986·54 cites·11 claims
- 0687US4345646AApparatus for chemical cuttingGEARHART IND INC·Filed 1979·Granted Aug 24, 1982·63 cites·12 claims
- 0784US4494601ADownhole chemical cutting toolGEARHART IND INC·Filed 1981·Granted Jan 22, 1985·42 cites·19 claims
- 0882US4709357AMethod and apparatus for acoustically investigating a borehole casing cement bondGEARHART IND INC·Filed 1985·Granted Nov 24, 1987·65 cites·18 claims
- 0977US4558220ARadioactivity well loggingGEARHART IND INC·Filed 1981·Granted Dec 10, 1985·50 cites·26 claims
- 1073US4415029ADownhole well tool and anchoring assemblyGEARHART IND INC·Filed 1981·Granted Nov 15, 1983·44 cites·18 claims
- 1172US4562743ACable elongation measurement apparatusGEARHART IND INC·Filed 1984·Granted Jan 7, 1986·42 cites·9 claims
- 1271US4392377AEarly gas detection system for a drill stem testGEARHART IND INC·Filed 1981·Granted Jul 12, 1983·39 cites·9 claims
- 1367US4620591AChemical cutting apparatus having selective pressure bleed-offGEARHART IND INC·Filed 1985·Granted Nov 4, 1986·38 cites·15 claims
- 1467US4530161ACaliper tool using magnetostrictive displacement transducerGEARHART IND INC·Filed 1984·Granted Jul 23, 1985·18 cites·19 claims
- 1564US4697638ADownhole logging and servicing system with manipulatable logging and servicing toolsGEARHART IND INC·Filed 1986·Granted Oct 6, 1987·40 cites·25 claims
- 1660US4292842ATool for testing earth formations in boreholesGEARHART IND INC·Filed 1980·Granted Oct 6, 1981·26 cites·2 claims
- 1759US4302881ACalibrated conduit caliper and methodGEARHART IND INC·Filed 1980·Granted Dec 1, 1981·30 cites·9 claims
- 1857US4428430AChemical method and apparatus for perforating drill collarsGEARHART IND INC·Filed 1981·Granted Jan 31, 1984·23 cites·12 claims
- 1956US4523148AMethod and apparatus for determining the spontaneous earth potential log from downhole gradient measurementsGEARHART IND INC·Filed 1981·Granted Jun 11, 1985·19 cites·14 claims
- 2050US4646026AMethod and apparatus for measuring resistivity of an earth formationGEARHART IND INC·Filed 1985·Granted Feb 24, 1987·20 cites·18 claims
- 2148US4730263AMethod and device for measuring gamma radiationGEARHART IND INC·Filed 1985·Granted Mar 8, 1988·16 cites·18 claims
- 2248US4506156AEarth formation porosity determination with dual epithermal neutron detector systemGEARHART IND INC·Filed 1981·Granted Mar 19, 1985·15 cites·6 claims
- 2347US4289024AWell casing free-point indicatorGEARHART IND INC·Filed 1979·Granted Sep 15, 1981·12 cites·10 claims
- 2442US4613394AStaged chemical pipe cutterGEARHART IND INC·Filed 1984·Granted Sep 23, 1986·10 cites·3 claims
- 2537US4315797AChemical pipe cutter with exponential spacing between reactant stagesGEARHART IND INC·Filed 1980·Granted Feb 16, 1982·9 cites·6 claims
- 2634US4385449AMethod and apparatus for measuring tilt and relative bearingGEARHART IND INC·Filed 1981·Granted May 31, 1983·8 cites·20 claims
- 2731US4703804ADebris removal and gauge ring device and methodGEARHART IND INC·Filed 1986·Granted Nov 3, 1987·11 cites·3 claims
- 2830US4470335AMethod and apparatus for remote attachmentGEARHART IND INC·Filed 1982·Granted Sep 11, 1984·1 cites·14 claims
- 2928US4408927AThreaded joint toggle-locked with a helical springGEARHART IND INC·Filed 1981·Granted Oct 11, 1983·11 cites·6 claims
- 3023US4448248AEnhanced flow tool positionerGEARHART IND INC·Filed 1981·Granted May 15, 1984·3 cites·4 claims
- 3117US4694166ALogging device having bimetallic insulating flaskGEARHART IND INC·Filed 1985·Granted Sep 15, 1987·4 cites·12 claims
- 3213US4428072ASeismic well log display method and apparatusGEARHART IND INC·Filed 1980·Granted Jan 24, 1984·2 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when GEARHART IND INC files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →