Inventor · disambiguated record
Jorg A. Angehrn
Also filed as: ANGEHRN JORG A · ANGEHRN JORG AUGUST
24 granted patents·526 citations·filing 1975–1992
97Inventor score
Top patents by PatentIndex Score
24 records- 0187US4041780AMethod and apparatus for logging earth boreholesDRESSER IND·Filed 1976·Granted Aug 16, 1977·62 cites·15 claims
- 0285US4556884ADepth dependent multiple logging systemDRESSER IND·Filed 1982·Granted Dec 3, 1985·52 cites·14 claims
- 0385US4047430AMethod and apparatus for logging earth boreholes using self-contained logging instrumentDRESSER IND·Filed 1976·Granted Sep 13, 1977·38 cites·8 claims
- 0480US4271356AMethod and apparatus for natural gamma ray spectrum analysis using microprocessor stripperDRESSER IND·Filed 1979·Granted Jun 2, 1981·27 cites·7 claims
- 0573US4722603AInterferometric means and method for accurate determination of fiber-optic well logging cable lengthCHEVRON RES·Filed 1986·Granted Feb 2, 1988·37 cites·9 claims
- 0670US4714889AMethod of interpreting impedance distribution of an earth formation using precursor logging data provided by a multi-electrode logging array stationary within a boreholeCHEVRON RES·Filed 1985·Granted Dec 22, 1987·36 cites·21 claims
- 0769US4297879AWell logging correlation method and apparatusHOWELLS ANTHONY P·Filed 1979·Granted Nov 3, 1981·29 cites·98 claims
- 0863US5164548AMethod and apparatus for ultrasonic scanning of a borehole having improved sensor array and timing circuitCHEVRON RES & TECH·Filed 1991·Granted Nov 17, 1992·38 cites·9 claims
- 0962US4703279AMethod of interpreting impedance distribution of an earth formation penetrated by a borehole using precursor data provided by a moving logging array having a single continuously emitting current electrode and a multiplicity of potential electrodesCHEVRON RES·Filed 1985·Granted Oct 27, 1987·27 cites·17 claims
- 1061US4402068AMethod and apparatus for acoustic well loggingDRESSER IND·Filed 1981·Granted Aug 30, 1983·19 cites·4 claims
- 1155US4320470AMethod and apparatus for acoustic well loggingDRESSER IND·Filed 1979·Granted Mar 16, 1982·15 cites·1 claims
- 1252US4675611AMethod of logging an earth formation penetrated by a borehole to provide an improved estimate of impedance distribution of the formationCHEVRON RES·Filed 1985·Granted Jun 23, 1987·18 cites·17 claims
- 1351US4346593AWell logging correction method and apparatusDRESSER IND·Filed 1980·Granted Aug 31, 1982·15 cites·22 claims
- 1449US4677385AMethd of logging an earth formation penetrated by a borehole to provide an estimate of impedance distribution with depth using end emitting current electrodes sequentially activated and a multiplicity of potential electrodes of a moving logging arrayCHEVRON RES·Filed 1985·Granted Jun 30, 1987·16 cites·13 claims
- 1546US4514809ADynamic range control of electrode pad current in well logging toolsDRESSER IND·Filed 1982·Granted Apr 30, 1985·11 cites·30 claims
- 1643US4675610AMethod of logging an earth formation penetrated by a borehole to provide an improved estimate of impedance distribution with depth using a single continuously emitting current electrode and a multiplicity of potential electrodes of a moving logging arrayCHEVRON RES·Filed 1985·Granted Jun 23, 1987·12 cites·13 claims
- 1743US4002063AWell logging pad devices having differential pressure reliefDRESSER IND·Filed 1975·Granted Jan 11, 1977·10 cites·4 claims
- 1842US4677386AMethod of interpreting impedance distribution of an earth formation obtained by a moving array using end emitting current electrodes sequentially activated and a series of potential electrodesCHEVRON RES·Filed 1985·Granted Jun 30, 1987·12 cites·14 claims
- 1941US4803479AElectrical phase measurement means and method for accurate determination of well logging cable lengthCHEVRON RES·Filed 1987·Granted Feb 7, 1989·10 cites·4 claims
- 2039US5276656AMethod for fluid identification and evaluation within wellbores using ultrasonic scanningCHEVRON RES & TECH·Filed 1992·Granted Jan 4, 1994·11 cites·1 claims
- 2137US4862424AInterferometric means and method for accurate determination of fiberoptic well logging cable lengthCHEVRON RES·Filed 1988·Granted Aug 29, 1989·8 cites·4 claims
- 2236US5138585AMethod for fluid identification and evaluation within wellbores using ultrasonic scanningCHEVRON RES & TECH·Filed 1990·Granted Aug 11, 1992·9 cites·5 claims
- 2333US4847814AThree-dimensional borehole televiewer displayCHEVRON RES·Filed 1987·Granted Jul 11, 1989·4 cites·8 claims
- 2431US4711122AFlexible mud excluder for borehole televiewerCHEVRON RES·Filed 1986·Granted Dec 8, 1987·10 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →