| Patents for G01V 3 - Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation (25,929) |
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| 02/08/2000 | US6023164 Eccentric NMR well logging apparatus and method |
| 02/08/2000 | US6023163 Well logging method and apparatus for determining gas and diffusion coefficient using NMR |
| 02/08/2000 | US6023159 Stud sensor with dual sensitivity |
| 02/03/2000 | CA2624853A1 Rfid system for detecting low power resonant tags |
| 02/02/2000 | EP0977057A2 Detecting tool motion effects on nuclear magnetic resonance measurements |
| 02/02/2000 | EP0977056A2 Method and apparatus determining the intensity of a radar signal having passed a measuring range |
| 02/02/2000 | EP0977020A1 Method, apparatus and set of two devices to determine the intensity of a radar signal |
| 02/02/2000 | EP0976625A2 Passenger detecting system and air bag apparatus using the same |
| 02/01/2000 | US6020741 Wellbore imaging using magnetic permeability measurements |
| 02/01/2000 | US6020739 Rapid method of optimal gradient waveform design for MRI |
| 01/27/2000 | WO2000004405A1 Method and apparatus for imaging earth formation |
| 01/25/2000 | US6018495 Method of borehole compensation of earth formation characteristic measurements using depth measurements |
| 01/25/2000 | US6018244 Method for detecting diastrophism by detecting VHF radio waves reflected by the ionosphere |
| 01/25/2000 | US6018243 NMR well logging apparatus and method |
| 01/13/2000 | WO2000002063A1 Buried object detector with generator producing electrical energy in response to movement |
| 01/12/2000 | EP0970362A1 Pulse sequence and method for suppression of magneto-acoustic artifacts in nmr data |
| 01/12/2000 | CN1240941A Method and instrument for detecting underground magnetofluid to search water |
| 01/11/2000 | US6014602 Motor vehicle occupant sensing systems |
| 01/11/2000 | US6014478 Optical switch |
| 01/11/2000 | US6014026 Boring technique for using locate point measurements for boring tool depth prediction |
| 01/11/2000 | US6014022 Proximity sensor circuit with frequency changing capability having a plurality of sensors and a multiplexer with a single filter |
| 01/06/2000 | WO2000000852A1 Method and device for detection of em waves in a well |
| 01/06/2000 | WO2000000851A1 Device for electromagnetic detection of geological properties in a well |
| 01/06/2000 | WO2000000850A1 Device and method for measurement of resistivity outside of a wellpipe |
| 01/06/2000 | WO2000000849A2 Device and method for measurement by guided waves on a metal string in a well |
| 01/06/2000 | WO2000000848A1 Apparatus for detecting metals |
| 01/06/2000 | WO1999050690A3 Position sensing |
| 01/04/2000 | US6011476 Metering circuit to detect dielectrokinetic response |
| 01/04/2000 | US6009754 Carrier for pipe and line locator |
| 01/04/2000 | US6009629 Process for determining the direction of the earth's magnetic field |
| 01/04/2000 | CA2147610C System for measuring the distance between two parallel boreholes or wells |
| 12/29/1999 | WO1999067661A1 Embedded sensor |
| 12/29/1999 | EP0967591A2 Transducer assembly |
| 12/29/1999 | EP0967490A2 Method for eliminating ringing during a nuclear magnetic resonance borehole measurement |
| 12/29/1999 | EP0967489A2 Methods and apparatus for NQR testing |
| 12/29/1999 | CN1239778A Survey technology utilizing directional emitted electromagnetic wave beam |
| 12/28/1999 | US6008651 Orientation sensor arrangement and method for use in a system for monitoring the orientation of an underground boring tool |
| 12/28/1999 | US6008646 Apparatus for protecting a magnetic resonance antenna |
| 12/28/1999 | US6008645 Prediction of permeability from capillary pressure curves derived from nuclear magnetic resonance pore size distributions |
| 12/28/1999 | US6006831 Electrical well logging fluid and method of using same |
| 12/23/1999 | WO1999066469A1 Omnidirectional deactivator for magnetic labels or tags of eas systems |
| 12/23/1999 | WO1999066466A2 A sensor, a method and a system for remote detection of objects |
| 12/23/1999 | WO1999066353A1 Wellbore imaging using magnetic permeability measurements |
| 12/23/1999 | WO1999049337A8 An interrogator for interrogating an rfid transponder |
| 12/23/1999 | DE19826391A1 Sensor for determining presence of persons esp. for vehicle seat with two flexible electrodes and dielectric between |
| 12/22/1999 | EP0807202A4 Method of monitoring fluids entering a wellbore |
| 12/21/1999 | US6005392 Method for the operation and for the evaluation of signals from an eddy current probe and device for performing the method |
| 12/21/1999 | US6005389 Pulse sequences and interpretation techniques for NMR measurements |
| 12/21/1999 | CA2206173C Improvements in time-domain electromagnetic geophysical mapping instruments |
| 12/16/1999 | WO1999065006A1 Identification tag with enhanced security |
| 12/16/1999 | WO1999064853A1 Metal sorting method and device |
| 12/16/1999 | WO1999064852A1 Detection of potential acid sulphate soils |
| 12/16/1999 | CA2333566A1 Identification tag with enhanced security |
| 12/15/1999 | EP0964379A2 Moving body detection system |
| 12/15/1999 | EP0871988B1 Electrode |
| 12/15/1999 | CN2354149Y Natural electric-field frequency selector |
| 12/14/1999 | US6002357 System for and method of determining the location of an object in a medium |
| 12/14/1999 | US6002258 Method for locating a boring tool |
| 12/14/1999 | US6002257 Method and apparatus for well bore hole-finding with simultaneous borehole or formation sensing |
| 12/14/1999 | US6002253 Magnetic field probe having a rectangular core formed of strips of material |
| 12/14/1999 | US6002252 Compact sensing apparatus having transducer and signal conditioner with a plurality of mounting pins |
| 12/07/1999 | USRE36427 System and method for controlling vehicle safety drive |
| 12/07/1999 | US5999884 Method for determining the axial position of formation layer boundaries using measurements made by a transverse electromagnetic induction logging instrument |
| 12/07/1999 | US5999883 Conductivity anisotropy estimation method for inversion processing of measurements made by a transverse electromagnetic induction logging instrument |
| 12/07/1999 | US5999090 Alarm sensor and antenna arrangement |
| 12/07/1999 | CA2181430C Plural frequency method and system for identifying metal objects in a background environment |
| 12/07/1999 | CA2127476C Logging or measurement while tripping |
| 12/02/1999 | WO1999062020A1 A method and a system for remote detection of markers |
| 12/01/1999 | EP0960408A1 Magnetostrictive element having optimized bias-field-dependent resonant frequency characteristic |
| 12/01/1999 | EP0960345A1 Method for automatic detection of planar heterogeneities crossing the stratification of an environment |
| 12/01/1999 | CN1237247A Passive geophysical phospecting apparatus and method |
| 12/01/1999 | CN1237246A Magnetic detecting technique |
| 12/01/1999 | CN1236860A Apparatus and method for determining drilling mode to optimize formation evaluation measurements |
| 11/30/1999 | US5995006 Radio frequency tag |
| 11/30/1999 | US5994904 Method and apparatus for monitoring the relative position of a cable boring head during a boring operation |
| 11/30/1999 | US5994901 Magnetic resonance logging instrument |
| 11/30/1999 | US5994897 Frequency optimizing metal detector |
| 11/30/1999 | US5992228 Method for determining resistivity derived porosity and porosity derived resistivity |
| 11/30/1999 | US5992094 Access control vestibule |
| 11/30/1999 | CA2153022C Circuit-like metallic foil sheet for resonance frequency characteristic tag and the like and process for fabricating it |
| 11/30/1999 | CA2142338C Position location system |
| 11/25/1999 | DE19821462A1 Contactless detection of ferromagnetic object for use as proximity switch or sensor |
| 11/25/1999 | DE19815342A1 Magnetic field measurement signal processing method for submerged bodies in water e.g. submarine |
| 11/24/1999 | EP0870205B1 Method and system for sensing and locating a person, e.g. under an avalanche |
| 11/24/1999 | EP0719420B1 Apparatus and method for locating a medical tube in the body of a patient |
| 11/24/1999 | CN1236111A Earth-quake predictor |
| 11/23/1999 | US5990683 Method and arrangement for locating a boring tool using a three-antennae vector sum |
| 11/23/1999 | US5990682 Method for determining the depth of an in-ground boring tool |
| 11/23/1999 | US5990050 Useful in the drilling, completing and working over of subterranean wells, such as oil wells; continuous phase propylene glycol n-butyl ether(s) having viscosity less than 10 centipoise at 25 degrees c and stabilizing emulsifier |
| 11/23/1999 | US5989691 Magnetic element |
| 11/23/1999 | US5988300 Composite material structures having reduced signal attenuation |
| 11/17/1999 | EP0957377A2 Device and method for locating metal objects |
| 11/17/1999 | EP0717855B1 Process and system for detecting hazardous abandoned objects |
| 11/17/1999 | CN1235677A Multi-layer magnetic tag |
| 11/17/1999 | CN1235237A Dual-wait time NMR processing for determing apparent T1/T2 ratios, total porosity and bound fluid porosity |
| 11/16/1999 | US5987386 Interpolation of induction tool response using geometrical factors as basis functions |
| 11/16/1999 | US5986550 Method for labeling, verification and/or identifying and device for implementing the method |
| 11/16/1999 | US5986455 Automatic tuning apparatus and method for substance detection using nuclear quadrupole resonance and nuclear magnetic resonance |
| 11/16/1999 | US5984238 Method and system for the autonomous on-board determination of the position of a satellite |
| 11/16/1999 | CA2164066C Well logging apparatus and method with borehole compensation |