| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 02/14/1978 | US4074186 Conductivity measuring instrument having linearization means and a digital read-out |
| 02/14/1978 | US4074184 Nonconductive vapor/solid or liquid fraction determination |
| 02/07/1978 | US4072897 Equivalent load-pull characterization of microwave transistors |
| 02/07/1978 | US4072892 Electrolytic measurement system with an inner post and an outer cylindrical shield fluid boundary |
| 01/31/1978 | US4071820 Measurement system |
| 01/31/1978 | US4071819 Device for sensing the real part in a complex impedance |
| 01/31/1978 | US4071817 High temperature electrochemical cell tester |
| 01/31/1978 | US4071780 Transient generator |
| 01/24/1978 | US4070619 Microstrip configuration with inductive pickup loop for VSWR meter |
| 01/24/1978 | US4070615 Compensation indicator for attenuation probe |
| 01/24/1978 | US4069710 Apparatus for the capacitative measurement of the surface level of fluid media in vessels |
| 01/10/1978 | US4068168 Electrical resistivity probe means |
| 01/10/1978 | US4068167 Radial electrode for determining the amount of moisture in seed cotton |
| 01/10/1978 | US4068166 Method and apparatus for measuring percent error of an impedance |
| 01/10/1978 | US4068162 Rinse tank control system |
| 01/03/1978 | US4066950 Circuit for measuring the ground resistance of an ungrounded power circuit |
| 12/20/1977 | US4064455 Fluid condition monitoring system |
| 12/13/1977 | US4063167 Blade tip clearance measuring apparatus |
| 12/13/1977 | US4063153 Vapor liquid fraction determination |
| 12/13/1977 | US4063027 Method of and apparatus for monitoring for electrode displacement in the Joule effect heating of heat softenable material |
| 11/22/1977 | US4059797 A.C. capacitance measuring bridge |
| 11/22/1977 | US4059795 Digital eddy current apparatus for sensing and analyzing metallurgical characteristics of an electrically conductive material |
| 11/15/1977 | US4058766 Multiple-frequency permittivity tester |
| 10/25/1977 | US4055799 Method of and device for measuring elastic and di-electric properties of the diaphragm of living cells |
| 10/25/1977 | US4055797 Electrolytic conductance meter |
| 10/18/1977 | US4054836 Transformer ratio-arm bridge with improved balancing means |
| 10/18/1977 | US4054833 Capacitance measuring system |
| 10/18/1977 | US4054832 System and method of measurement of insulation qualities of three-phase power equipment |
| 10/04/1977 | US4052666 Remote sensing of vegetation and soil using microwave ellipsometry |
| 09/27/1977 | US4050309 Method and apparatus for measuring temperature |
| 09/20/1977 | US4050018 Capacitance meter bias protection circuit |
| 09/13/1977 | US4048558 Method and apparatus for detecting metal failures in situ |
| 09/06/1977 | US4047239 Stationary induction apparatus having means to monitor insulation dryness |
| 09/06/1977 | US4047104 Ohmmeter for circuits carrying unknown currents |
| 09/06/1977 | US4047100 Meter for measuring syrup ratio in soft drinks and the like |
| 09/06/1977 | US4047099 Method and apparatus for determining boiler water conductivity |
| 09/06/1977 | US4047001 Encoding altimeter |
| 08/30/1977 | US4045733 Multiplex circuit with time delay for stabilization |
| 08/30/1977 | US4045728 Direct reading inductance meter |
| 08/30/1977 | US4045727 Microwave proximity detector |
| 08/30/1977 | US4045725 Rotating asymmetric electrode for measuring characteristics of electrochemical cells |
| 08/30/1977 | US4044607 Grain moisture measurement probe |
| 08/16/1977 | US4042880 Electrode assembly for measuring the effective thickness of thru-hole plating circuit board workpieces |
| 08/16/1977 | US4042879 Microwave aerosol waterometer |
| 08/09/1977 | US4041387 Apparatus and method for measuring the frequency of a sweeping signal |
| 08/02/1977 | US4039940 Capacitance sensor |
| 08/02/1977 | US4039939 Moisture measuring apparatus |
| 07/12/1977 | US4035719 Conductivity cell |
| 06/28/1977 | US4032841 Method and apparatus for measuring the capacitance of telephone cable pairs |
| 06/07/1977 | US4028618 Circuit for monitoring the conductivity of a solution |
| 06/07/1977 | US4028615 Method of and device for testing hermetically enclosed reed contacts |
| 06/07/1977 | US4028587 Marker circuit |
| 05/31/1977 | US4027237 Airborne microwave refractometer |
| 05/24/1977 | US4025847 Measurement system including bridge circuit |
| 05/17/1977 | US4024460 Electronic line stretcher |
| 05/10/1977 | US4023102 Test fixture |
| 05/10/1977 | US4023098 Noise burst source for transfer function testing |
| 05/10/1977 | US4023096 Method and apparatus for determining physical characteristics of emulsions |
| 05/10/1977 | US4022990 Technique and apparatus for measuring the value of a capacitance in an electrical circuit such as a telephone communication line |
| 05/03/1977 | US4021735 Method and apparatus for making a metal to semiconductor contact |
| 05/03/1977 | US4021729 Cross-field ground fault sensor |
| 04/26/1977 | US4020417 Soil moisture indicator device |
| 04/26/1977 | US4020416 Method of detecting heater resistance independent of contact resistance |
| 04/26/1977 | US4020364 Resistance read amplifier |
| 04/19/1977 | US4019134 Particle detector independent of errors caused by changes of electrolyte conductivity and electrode polarization |
| 04/19/1977 | US4019133 Corrosion detecting and monitoring apparatus |
| 04/12/1977 | US4017750 Circuit arrangement for effectively making integrated impedances accurate |
| 03/29/1977 | US4015202 Automatic measurement and display of resonance frequencies of seismic detection elements |
| 03/29/1977 | US4015199 Cell for measurement of the electrical conductivity of liquids |
| 03/22/1977 | US4013950 Apparatus for measuring the electromagnetic impedance of soils |
| 03/22/1977 | US4013949 Return loss test set |
| 03/15/1977 | US4012691 Heating with laser, measuring electrical resistance |
| 03/15/1977 | US4011746 Liquid density measurement system |
| 03/08/1977 | US4011529 Directional power detector for propagating waves |
| 03/08/1977 | US4011501 Apparatus and method for determining moisture content in welding electrode coatings |
| 03/08/1977 | US4010715 Fluid conductivity detecting means |
| 03/01/1977 | US4010416 Method and apparatus for testing dielectric adequacy and for indicating physical defects in a nonconducting material |
| 02/22/1977 | US4009437 Net analyzer for electronic circuits |
| 02/15/1977 | US4008433 Capacitance displacement type measuring probe |
| 02/15/1977 | US4008398 Transducer signal conditioning circuit |
| 02/08/1977 | US4007418 Personal electrostatic safety monitor with induction plate sensing means |
| 02/01/1977 | US4006409 Electrical ground fault detecting device |
| 02/01/1977 | US4006405 Method and apparatus for measuring parameters of a conductive material which can be used in independently determining thickness and conductivity |
| 01/25/1977 | US4005363 Range resolving ground line sensor |
| 01/18/1977 | US4003815 Apparatus for measuring stray current electrolytic corrosion |
| 01/11/1977 | US4003084 Method of and means for testing a tape record/playback system |
| 01/11/1977 | US4002968 Ground fault detector for a two-wire power supply |
| 01/04/1977 | US4001813 Precision capacitance to digital conversion system |
| 01/04/1977 | US4001675 Test set for measuring impedance and power dissipation of a crystal |
| 12/28/1976 | US4000458 Method for the noncontacting measurement of the electrical conductivity of a lamella |
| 12/21/1976 | US3999121 Well casing corrosion meter |
| 12/07/1976 | US3996514 Circuit board contact resistance probe |
| 12/07/1976 | US3996509 Conductivity dip cell |
| 11/30/1976 | US3995213 Surface impedance tester |
| 11/30/1976 | US3995212 Apparatus and method for sensing a liquid with a single wire transmission line |
| 11/23/1976 | US3993947 Admittance measuring system for monitoring the condition of materials |
| 11/23/1976 | US3993945 Measuring cells for measuring electrical conductivity of liquids |
| 11/16/1976 | US3992665 Electrical impedance measuring apparatus |
| 11/16/1976 | US3992662 Liquid conductivity measuring device |
| 11/16/1976 | US3991623 Marine instrument |