Assignee
SCHLUMBERGER IND SA
FR·160 granted patents·4,511 citations·filing 1984–1999
Top patents by PatentIndex Score
160 records- 0187US5442221AHall effect sensorSCHLUMBERGER IND SA·Filed 1993·Granted Aug 15, 1995·59 cites·18 claims
- 0287US5383369ADevice for measuring the velocity of a fluidSCHLUMBERGER IND SA·Filed 1994·Granted Jan 24, 1995·90 cites·16 claims
- 0385US6003383AVortex fluid meter incorporating a double obstacleSCHLUMBERGER IND SA·Filed 1996·Granted Dec 21, 1999·71 cites·26 claims
- 0485US5877547AActive security device including an electronic memorySCHLUMBERGER IND SA·Filed 1995·Granted Mar 2, 1999·86 cites·25 claims
- 0584US6047068AMethod for determining an encryption key associated with an integrated circuitSCHLUMBERGER IND SA·Filed 1996·Granted Apr 4, 2000·78 cites·23 claims
- 0684US5510074AMethod for manufacturing smart cardsSCHLUMBERGER IND SA·Filed 1994·Granted Apr 23, 1996·85 cites·10 claims
- 0784US5509073ACommunications networkSCHLUMBERGER IND SA·Filed 1993·Granted Apr 16, 1996·168 cites·9 claims
- 0884US4961893AMethod for manufacturing memory cardsSCHLUMBERGER IND SA·Filed 1989·Granted Oct 9, 1990·59 cites·7 claims
- 0983US4899046AOptical sensor of physical magnitudeSCHLUMBERGER IND SA·Filed 1989·Granted Feb 6, 1990·49 cites·19 claims
- 1082US4910774AMethod and system for suthenticating electronic memory cardsSCHLUMBERGER IND SA·Filed 1988·Granted Mar 20, 1990·277 cites·8 claims
- 1181US6591229B1Metrology device with programmable smart cardSCHLUMBERGER IND SA·Filed 1998·Granted Jul 8, 2003·56 cites·8 claims
- 1281US5309946AFlow rectifierSCHLUMBERGER IND SA·Filed 1992·Granted May 10, 1994·43 cites·8 claims
- 1381US5197095ASystem for remote transfer and collection of data, in particular from metersSCHLUMBERGER IND SA·Filed 1991·Granted Mar 23, 1993·125 cites·4 claims
- 1480US6003385AUltrasound apparatus for measuring the flow speed of a fluidSCHLUMBERGER IND SA·Filed 1997·Granted Dec 21, 1999·54 cites·14 claims
- 1578US5935497AMethod of printing a graphic on a memory cardSCHLUMBERGER IND SA·Filed 1996·Granted Aug 10, 1999·56 cites·5 claims
- 1678US5057460AMethod of making an electronic module, for insertion into an electronic memory-card bodySCHLUMBERGER IND SA·Filed 1989·Granted Oct 15, 1991·52 cites·9 claims
- 1777US5864067AFluidic oscillator and a method of measuring a volume-related quantity of fluid flowing through such a fluidic oscillatorSCHLUMBERGER IND SA·Filed 1996·Granted Jan 26, 1999·36 cites·29 claims
- 1877US5245633ASystem for transmitting digital data over an electricity power lineSCHLUMBERGER IND SA·Filed 1992·Granted Sep 14, 1993·78 cites·10 claims
- 1977US4852155ASysteme d'authentification analogique reciproque entre un terminal et une ligne de transmissionSCHLUMBERGER IND SA·Filed 1988·Granted Jul 25, 1989·39 cites·21 claims
- 2076US6357034B1Data communication method and the use of the method in a system for remotely reading metersSCHLUMBERGER IND SA·Filed 1999·Granted Mar 12, 2002·65 cites·15 claims
- 2176US5808209AVortex fluid meter including a profiled pipeSCHLUMBERGER IND SA·Filed 1996·Granted Sep 15, 1998·48 cites·22 claims
- 2276US5400006ACurrent transformer with plural part coreSCHLUMBERGER IND SA·Filed 1993·Granted Mar 21, 1995·39 cites·6 claims
- 2375US5396808AFluidic oscillatorSCHLUMBERGER IND SA·Filed 1993·Granted Mar 14, 1995·42 cites·19 claims
- 2473US6420695B1Method for wavelength calibration of an electromagnetic radiation filtering deviceSCHLUMBERGER IND SA·Filed 1999·Granted Jul 16, 2002·48 cites·19 claims
- 2573US5920391ATunable Fabry-Perot filter for determining gas concentrationSCHLUMBERGER IND SA·Filed 1998·Granted Jul 6, 1999·46 cites·20 claims
- 2673US5881155ASecurity device for a semiconductor chipSCHLUMBERGER IND SA·Filed 1997·Granted Mar 9, 1999·49 cites·23 claims
- 2773US5387873AMethod of synchronizing two signalsSCHLUMBERGER IND SA·Filed 1992·Granted Feb 7, 1995·63 cites·3 claims
- 2873US5005282AMethod of making an electronic memory cardSCHLUMBERGER IND SA·Filed 1989·Granted Apr 9, 1991·41 cites·11 claims
- 2972US5363704AFluidic oscillator and a flow meter including such an oscillatorSCHLUMBERGER IND SA·Filed 1992·Granted Nov 15, 1994·36 cites·19 claims
- 3071US5429222ADevice for verifying the conformity of and for routing objects inserted in a dispenserSCHLUMBERGER IND SA·Filed 1994·Granted Jul 4, 1995·53 cites·12 claims
- 3170US5365655AMethod of making an electronic module for a memory card and an electronic module thus obtainedSCHLUMBERGER IND SA·Filed 1992·Granted Nov 22, 1994·45 cites·4 claims
- 3270US5164144AProcess for making card bodies and cards incorporating graphic symbolsSCHLUMBERGER IND SA·Filed 1990·Granted Nov 17, 1992·45 cites·4 claims
- 3369US5878790ARecovery system for recovering hydrocarbon vapor and offering improved stabilitySCHLUMBERGER IND SA·Filed 1996·Granted Mar 9, 1999·38 cites·6 claims
- 3469US4999601AMemory card read/write device provided with an anti-fraud deviceSCHLUMBERGER IND SA·Filed 1988·Granted Mar 12, 1991·32 cites·9 claims
- 3568US5691586ASystem for providing rotary drive between two mechanical members by means of magnetic coupling, and a fluid meter including such a systemSCHLUMBERGER IND SA·Filed 1995·Granted Nov 25, 1997·33 cites·11 claims
- 3668US5503440ADevice for controlling the opening and closing of a plurality of doors, each giving access to an enclosureSCHLUMBERGER IND SA·Filed 1994·Granted Apr 2, 1996·31 cites·19 claims
- 3768US5451947AModulated dither signalSCHLUMBERGER IND SA·Filed 1994·Granted Sep 19, 1995·35 cites·10 claims
- 3867US6119070AMethod for acoustically measuring a fluid flow rateSCHLUMBERGER IND SA·Filed 1998·Granted Sep 12, 2000·28 cites·24 claims
- 3967US5880454AElectronic payment card with an interchangeable moduleSCHLUMBERGER IND SA·Filed 1996·Granted Mar 9, 1999·48 cites·8 claims
- 4066US5107505ACircuit of encoding and formatting data for rotating head recordersSCHLUMBERGER IND SA·Filed 1989·Granted Apr 21, 1992·21 cites·7 claims
- 4166US5083309AMethod and a system enabling software to be run securelySCHLUMBERGER IND SA·Filed 1990·Granted Jan 21, 1992·74 cites·14 claims
- 4266US5057679ATechnique for attaching an electronic module to a card body to form an electronic memory cardSCHLUMBERGER IND SA·Filed 1989·Granted Oct 15, 1991·44 cites·5 claims
- 4365US5959216AMethod of conditioning a fluid flow, and a fluid flow conditionerSCHLUMBERGER IND SA·Filed 1997·Granted Sep 28, 1999·29 cites·33 claims
- 4465US5679007APortable interface for an electronic smart cardSCHLUMBERGER IND SA·Filed 1995·Granted Oct 21, 1997·130 cites·16 claims
- 4564US5335555AVolume flow meter that measures transit timeSCHLUMBERGER IND SA·Filed 1993·Granted Aug 9, 1994·27 cites·15 claims
- 4663US6079281ASingle-jet liquid meter with improved driving torqueSCHLUMBERGER IND SA·Filed 1998·Granted Jun 27, 2000·32 cites·22 claims
- 4763US5996099AMethod and apparatus for automatically testing electronic components in parallel utilizing different timing signals for each electronic componentSCHLUMBERGER IND SA·Filed 1996·Granted Nov 30, 1999·29 cites·8 claims
- 4863US4821768ATranquillizer device for requlating the flow profile of fluidSCHLUMBERGER IND SA·Filed 1984·Granted Apr 18, 1989·31 cites·8 claims
- 4962US5086216AMemory card with fuses and a system for handling such memory cardsSCHLUMBERGER IND SA·Filed 1989·Granted Feb 4, 1992·25 cites·3 claims
- 5062US5038043AHigh resolution method and apparatus for localizing neutral particlesSCHLUMBERGER IND SA·Filed 1989·Granted Aug 6, 1991·12 cites·24 claims
Showing the top 50 of 160 patent records by PatentIndex Score.
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