| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 03/06/1979 | CA1050114A1 Admittance measuring system for monitoring the condition of materials |
| 02/27/1979 | US4142144 Position detector |
| 02/27/1979 | US4142143 Lightning ground system attachable admittance testing instrument |
| 02/27/1979 | US4142142 High voltage A.C. test set for measuring true leakage current |
| 02/27/1979 | US4141351 ECG electrode impedance checking system as for emergency medical service |
| 02/20/1979 | CA1049097A1 Cross-field ground fault sensor |
| 02/20/1979 | CA1049094A1 Apparatus and method for measuring the frequency of a sweeping signal |
| 02/13/1979 | US4139815 Linear distortion measuring |
| 02/06/1979 | US4138675 Freezing point monitoring system for fruit trees and the like |
| 02/06/1979 | US4138639 Fluid conductivity measurement |
| 01/23/1979 | US4136313 Apparatus for measuring q-quality of oscillatory circuit components |
| 01/23/1979 | US4135397 Level measuring system |
| 01/16/1979 | US4135151 Apparatus for detecting wet and icy surface conditions |
| 01/16/1979 | US4135131 Microwave time delay spectroscopic methods and apparatus for remote interrogation of biological targets |
| 01/16/1979 | US4135129 Ground fault circuit interruptor test apparatus |
| 01/16/1979 | CA1046583A1 Power outlet circuit tester with ground fault testing capability |
| 01/02/1979 | US4132945 System for aligning whip antenna matching base units |
| 01/02/1979 | US4132944 Apparatus for monitoring electrical properties of a liquid |
| 12/26/1978 | US4131845 Microwave moisture sensor chute |
| 12/19/1978 | US4130797 Gas component sensing apparatus |
| 12/19/1978 | US4130796 Calibrating and measuring circuit for a capacitive probe-type instrument |
| 12/12/1978 | US4129824 Electronic hydrometer |
| 12/12/1978 | CA1044326A1 Measurement system including bridge circuit |
| 11/28/1978 | US4127808 Engine chip detector |
| 11/21/1978 | US4126033 Determination of thermal conductances of bonding layers in infrared photoconductor arrays |
| 11/21/1978 | CA1042682A1 Detection device for oil floating on water |
| 11/14/1978 | CA1042228A1 Water depth measuring device |
| 10/31/1978 | US4123703 Microwave method of and apparatus for flaw detection |
| 10/31/1978 | US4123702 Method for classifying and measuring of timbers |
| 10/31/1978 | CA1041605A1 Technique and apparatus for measuring the value of a capacitance in an electrical circuit such as a telephone communication line |
| 10/24/1978 | US4122389 Moisture sensor |
| 10/24/1978 | US4122388 Apparatus for testing the shaft/bearing insulation of a turbo-machine |
| 10/24/1978 | CA1041173A1 Noise burst source for transfer function testing |
| 10/10/1978 | US4119909 Pulsed DC transient conductivity measurement system |
| 10/10/1978 | CA1040265A1 In-service technique for measuring transmission characteristics of a microwave radio link |
| 10/03/1978 | US4118666 Automatic communication signal monitoring system |
| 10/03/1978 | US4118665 Time domain phase measuring apparatus |
| 10/03/1978 | US4118663 Four electrode conductivity sensor |
| 10/03/1978 | CA1039809A1 Digital apparatus for rapidly detecting the growth of and identifying micro-biological organisms |
| 09/26/1978 | US4117345 Marine ground isolator |
| 09/12/1978 | US4114090 Electronic moisture meter |
| 09/12/1978 | US4114089 Ground fault detecting apparatus including current-responsive threshold detection circuitry |
| 09/12/1978 | CA1038453A1 Means for detecting ground insulation failure for rotary electric machines |
| 09/05/1978 | US4112356 Semiconductor gas detector circuit |
| 09/05/1978 | US4112355 Quality and fit measuring apparatus for fasteners and their holes |
| 09/05/1978 | US4112354 Mobile bridge test apparatus and method utilizing a sub-power frequency test signal for cable system evaluation |
| 09/05/1978 | US4112353 Method for testing dielectric adequacy and for indicating physical defects in a nonconducting material by depositing traces of carbon on the material |
| 09/05/1978 | CA1038039A1 Apparatus for locating non-linear junctions between metallic materials and/or semiconductive materials |
| 08/29/1978 | US4110686 Piezoelectric-tuned microwave cavity for absorption spectrometry |
| 08/29/1978 | US4110685 Standing wave ratio measurement instrument |
| 08/29/1978 | US4110572 Method and apparatus for testing transmission lines |
| 08/29/1978 | US4109645 Development of instruments measuring body resistance to ion and ionophoresis applications |
| 08/22/1978 | US4109196 Resistance measuring circuit |
| 08/22/1978 | CA1037120A1 Moisture measurement apparatus |
| 08/15/1978 | US4107599 Electrode for an impedance measuring apparatus |
| 08/15/1978 | US4107598 Electromagnetic wave logging system for determining resistivity and dielectric constant of earth formations |
| 08/15/1978 | US4106299 Method for installation of grounding pole |
| 08/01/1978 | US4104585 Measurement of impurity concentration in liquids |
| 08/01/1978 | US4104584 Moisture content meter |
| 08/01/1978 | US4104583 Six-port measuring circuit |
| 08/01/1978 | US4104578 Portable digital ohmmeter |
| 07/25/1978 | US4103228 Method for determining whether holes in dielectric layers are opened |
| 07/25/1978 | US4103227 Ion-controlled diode |
| 07/25/1978 | US4103225 System and method for determining capacitance and cable length in the presence of other circuit elements |
| 07/25/1978 | US4103223 Closed loop for automatic substitution of a signal of equal amplitude |
| 07/18/1978 | US4101828 Corrosion detector |
| 07/04/1978 | US4099118 Electronic wall stud sensor |
| 07/04/1978 | US4098112 Steam turbine expansion joint with probe for monitoring molten caustics |
| 06/27/1978 | US4097796 Method for testing radomes |
| 06/27/1978 | US4097795 Elastomer belt impregnated with carbon for testing dielectric adequacy and for indicating physical defects in a nonconducting material |
| 06/20/1978 | US4096441 Test instrument for transmitters |
| 06/13/1978 | US4095180 Method and apparatus for testing conductivity using eddy currents |
| 06/13/1978 | US4095176 Method and apparatus for evaluating corrosion protection |
| 06/13/1978 | US4095174 System for detecting leakage faults in a pipeline by measuring the distributed capacitance of sections of a sensing cable buried parallel to said pipeline |
| 06/13/1978 | US4094199 Accelerometer |
| 06/06/1978 | US4093915 Capacitance measuring system |
| 06/06/1978 | US4093914 Method of measuring parameters of a crystal filter |
| 05/30/1978 | US4092567 Method and circuit for generating diamond markers |
| 05/30/1978 | US4091833 Device for detecting predetermined foaming conditions in fluids |
| 05/16/1978 | US4090126 Frequency marker generator |
| 05/09/1978 | US4088949 Batteryless ohmmeter |
| 05/09/1978 | US4088948 Single tone technique for measuring IM distortion |
| 05/02/1978 | US4087798 Device and method for determining the presence of resonant materials |
| 05/02/1978 | US4087746 Method for determination of optical anisotropy of dielectric material by microwave |
| 05/02/1978 | US4087745 Technique for contactless characterization of semiconducting material and device structures |
| 04/18/1978 | US4085361 Measurement of frequency response with improved sensitivity and accuracy |
| 04/18/1978 | US4085023 Apparatus for detecting elements |
| 04/18/1978 | CA1029808A1 Continuous monitoring or the internal resistance of an electrolytic cell |
| 04/11/1978 | US4084132 Swept group delay measurement |
| 04/04/1978 | US4082997 Oil detecting device |
| 04/04/1978 | US4082994 Vapor/liquid fraction determination |
| 03/28/1978 | US4081744 Resistance bridge transducer conditioning circuit |
| 03/28/1978 | US4080829 Apparatus for automatically measuring the resistance and heating up of resistive electrical components |
| 03/21/1978 | US4080566 RF directional wattmeter |
| 03/21/1978 | US4080563 Haylage/silage moisture tester |
| 03/21/1978 | US4080562 Apparatus for measuring capacitance or resistance and for testing a capacitance responsive gaging system |
| 03/21/1978 | US4080561 Method and apparatus for testing dielectric adequacy and for indicating physical defects in a nonconducting material |
| 02/21/1978 | US4075557 Contactless facilities for determining the specific resistance of a test sample |
| 02/21/1978 | US4075554 Vswr meter circuit using variable rf attenuator |
| 02/14/1978 | US4074241 Radiosonde circuitry for impedance measurement of an Al2 O3 absolute water vapor sensor |