| 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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| 07/16/1998 | WO1998025164A3 Well logging method and apparatus for nmr and resistivity measurements |
| 07/15/1998 | EP0852737A1 Lithology-independent gradient nmr gas detection |
| 07/15/1998 | EP0788640B1 Method of detecting labels with amorphous magneto-elastical tapes |
| 07/14/1998 | US5781436 Method and apparatus for transverse electromagnetic induction well logging |
| 07/14/1998 | US5781005 For detecting the presence of passing ferromagnetic articles |
| 07/09/1998 | WO1998029765A1 Apparatus for sensing vehicles |
| 07/09/1998 | WO1998029712A1 Magnetic resonance sensor |
| 07/09/1998 | WO1998029639A1 Method for formation evaluation while drilling |
| 07/09/1998 | WO1998000694A3 Process and article for determining the residence time of a food particle |
| 07/08/1998 | EP0829020A4 Narrow field electromagnetic sensor system and method |
| 07/07/1998 | US5777478 Passive geophysical prospecting apparatus and method based upon detection of discontinuities associated with extremely low frequency electromagnetic fields |
| 07/07/1998 | US5777477 Method of magnetic source localization using gradient tensor components and rate tensor components |
| 07/07/1998 | US5777476 Ground global tomography (CGT) using modulation of the ionospheric electrojets |
| 07/07/1998 | CA2056821C Apparatus and technique for nmr diffusion measurement |
| 07/02/1998 | WO1998028639A2 Display element for use in a magnetic merchandise monitoring system |
| 07/02/1998 | WO1998028638A1 Method for prospecting petroleum products in the ground |
| 07/02/1998 | WO1998028637A2 Method, apparatus, and article of manufacture for solving 3d maxwell equations in inductive logging applications |
| 07/02/1998 | DE19709889C1 Computer-aided geophysical measuring device for submerged areas |
| 07/01/1998 | EP0850425A1 Radio frequency tag |
| 07/01/1998 | EP0850421A1 Cylindrical electromagnetic sensor and method for the simultaneous determination of various parameters of an associated cylindrical target |
| 07/01/1998 | EP0850162A1 System and method for controlling vehicle safety device |
| 07/01/1998 | CN1186589A Compact transponder and manufacture thereof |
| 07/01/1998 | CN1186239A Method for detection of magnetic substances in non-magnetic products and apparatus for detection |
| 06/30/1998 | US5774360 Method of correcting formation resistivity well logs for the effects of formation layer inclination with respect to the wellbore |
| 06/30/1998 | US5774091 Short range micro-power impulse radar with high resolution swept range gate with damped transmit and receive cavities |
| 06/30/1998 | US5773971 Three electrode AC detection |
| 06/30/1998 | US5771530 Shell casing retrieval system |
| 06/25/1998 | WO1998027442A1 Method for forming a radio frequency responsive target and apparatus for verifying the authenticity of same |
| 06/24/1998 | EP0849611A2 Locating device for underground objects |
| 06/24/1998 | EP0848832A1 Method and arrangement for determining the position of a marker in an organic cavity |
| 06/23/1998 | US5770945 Seafloor magnetotelluric system and method for oil exploration |
| 06/23/1998 | US5770944 Method and probe arrangement for the electromagnetic detection of metal objects |
| 06/23/1998 | US5770943 Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents |
| 06/18/1998 | WO1998026312A1 Magnetic tags |
| 06/18/1998 | CA2274552A1 Magnetic tags |
| 06/17/1998 | EP0848262A2 Amplifier adapted for an induction sensor |
| 06/17/1998 | EP0848261A2 Probe for detection of alternating magnetic fields |
| 06/17/1998 | CN1185210A Spatial magnetic interrogation |
| 06/16/1998 | US5767953 Light beam range finder |
| 06/16/1998 | US5767680 Method for sensing and estimating the shape and location of oil-water interfaces in a well |
| 06/16/1998 | US5767679 Geophysical prospecting apparatus utilizing pulsed electromagnetic signals and having a scanned four-cycle transmitter |
| 06/16/1998 | US5767678 In a technique for locating a boring tool |
| 06/16/1998 | US5767674 Apparatus for protecting a magnetic resonance antenna |
| 06/16/1998 | US5767672 Inductive proximity sensor for detecting magnetic and non-magnetic metallic objects |
| 06/11/1998 | WO1998025166A1 Process and device for producing anti-theft elements for electronic anti-theft securing of articles |
| 06/11/1998 | WO1998025165A1 Process and device for producing electronic anti-theft elements |
| 06/11/1998 | WO1998025164A2 Well logging method and apparatus for nmr and resistivity measurements |
| 06/10/1998 | EP0846310A1 Method and device for measuring the magnetic properties of sheet materials |
| 06/10/1998 | DE19650611A1 Verfahren und Vorrichtung zur Herstellung von Sicherungselementen für die elektronische Artikelsicherung sowie ein entsprechendes Bandmaterial Method and apparatus for the production of security elements for electronic article surveillance, as well as a corresponding tape material |
| 06/10/1998 | DE19650610A1 Verfahren und Vorrichtung zur Herstellung von elektronischen Sicherungselementen Method and apparatus for production of electronic security elements |
| 06/09/1998 | US5764145 Capacitive detector device and alarm system |
| 06/09/1998 | US5764127 For inducing a signal in a conductor |
| 06/09/1998 | US5764062 Technique for establishing and recording a boring tool path using a survey reference level |
| 06/09/1998 | US5764061 Maritime apparatus for locating a buried submarine cable |
| 06/09/1998 | US5764058 Signal processing method for determining the number of exponential decay parameters in multiexponentially decaying signals and its application to nuclear magnetic resonance well logging |
| 06/09/1998 | US5764055 Magnetism sensor using a magnetism detecting device of a magnetic impedance effect type and control apparatus using the same |
| 06/09/1998 | US5762461 Apparatus for automatically positioning a receptacle pickup arm |
| 06/09/1998 | US5762064 Medical magnetic positioning system and method for determining the position of a magnetic probe |
| 06/04/1998 | WO1998024077A1 Device and method using dielectrokinesis to locate entities |
| 06/04/1998 | CA2272749A1 Device and method using dielectrokinesis to locate entities |
| 06/03/1998 | EP0845109A1 System for and method of determining the location of an object in a medium |
| 06/03/1998 | CN1183835A Method and apparatus for detemining |
| 06/03/1998 | CN1183834A Method and apparatus for detection of diastrophism |
| 06/02/1998 | US5760688 Body sensing device |
| 05/29/1998 | CA2615013A1 Radio frequency automatic identification system |
| 05/28/1998 | WO1998022836A1 Device for presence detection |
| 05/28/1998 | DE19725431A1 Determining position of buried pipes |
| 05/27/1998 | EP0844500A2 Method and apparatus for localisation and identification of underground object, in particular plastic mines |
| 05/27/1998 | EP0844499A2 Method for operating and signal processing of an eddy-current probe and apparatus for carrying out this method |
| 05/27/1998 | CA2222344A1 Geophysical mapping process hydrogeophysics |
| 05/26/1998 | US5757320 Short range, ultra-wideband radar with high resolution swept range gate |
| 05/26/1998 | US5757196 Capacitive switch actuated by changes in a sensor capacitance |
| 05/26/1998 | US5757191 Virtual induction sonde for steering transmitted and received signals |
| 05/26/1998 | US5757190 System including an arrangement for tracking the positional relationship between a boring tool and one or more buried lines and method |
| 05/26/1998 | US5757186 Nuclear magnetic resonance well logging apparatus and method adapted for measurement-while-drilling |
| 05/20/1998 | EP0842443A1 Method for automatically determining stratification beds in a site |
| 05/20/1998 | EP0842440A1 Short range radio locator system |
| 05/20/1998 | EP0815471A4 Open permanent magnet structure for generating highly uniform field |
| 05/20/1998 | CN2282194Y Natural electric field selected frequency potential difference comparing article survey instrument |
| 05/19/1998 | US5754050 Method and apparatus for measuring geometrical characteristics of a well, in particular a hydrocarbon well |
| 05/19/1998 | US5754049 Method and apparatus for locating buried conductors in the presence of plural conductors |
| 05/19/1998 | CA2066560C Coincident coil frequency-domain electromagnetic system |
| 05/14/1998 | WO1998020605A1 A resonant power converter for energising a coil |
| 05/14/1998 | WO1998020369A1 Seismic activity predictor |
| 05/14/1998 | DE19646462A1 Intrusion monitoring system in passage opening especially doorway |
| 05/13/1998 | EP0840869A1 Pipeline vehicle |
| 05/13/1998 | EP0681706B1 Apparatus for locating buried conductors |
| 05/13/1998 | CN1181808A Process for determining the direction of the earth's magnetic field |
| 05/07/1998 | WO1998019183A1 Formation producibility and water cut from nmr data using isolated pore model |
| 05/07/1998 | DE19702996C1 Removal detection arrangement for dental hand-held tool |
| 05/06/1998 | EP0840142A2 Improved method and apparatus for determining dip angle, and horizontal and vertical conductivities |
| 05/06/1998 | EP0840141A2 Well logging data interpretation |
| 05/06/1998 | EP0839330A1 Improvements relating to magnetic tags of markers |
| 05/06/1998 | EP0839324A1 System and method for measuring the total electron content of the ionosphere |
| 05/05/1998 | US5748088 Device and method using dielectrokinesis to locate entities |
| 05/01/1998 | CA2217427A1 Systems and methods for forward modeling of well logging tool responses |
| 04/30/1998 | WO1998018025A1 Earthquake forecast method and apparatus |
| 04/30/1998 | WO1998018024A1 Device for measuring electrical parameters of soil |
| 04/30/1998 | WO1998018023A1 Method and device for measurement with sinusoidal alternating current in direct current geoelectrics |
| 04/30/1998 | DE19652977C1 Buried object locating device for ferromagnetic, plastics or metallic objects |