| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 08/09/1990 | WO1990008963A1 Precision capacitive transducer circuits and methods |
| 08/08/1990 | EP0381596A1 Method and apparatus for measuring capacities of low value |
| 08/07/1990 | US4947132 Method for detecting thickness variations in the wall of a tubular body which conducts electricity |
| 08/07/1990 | US4947130 Impedance measuring apparatus |
| 08/07/1990 | CA1272508A1 Method and apparatus for measuring delay and/or gain differences |
| 08/01/1990 | CN1009031B Differential capacitor measuring circuit and multirange measuring instrument |
| 07/31/1990 | US4945304 Device for monitoring the unbalance of the electric power demanded |
| 07/26/1990 | WO1990008207A1 Cryoelectrosynthesis |
| 07/26/1990 | DE4001274A1 Dynamic measurement of high value ohmic resistance - using pulse shaping and timing to reduce polarisation and capacitive effects during measurement phase of overall cycle time |
| 07/24/1990 | US4943778 Instrument for measuring high frequency characteristics of sheet-like materials |
| 07/24/1990 | CA1271931A1 Capacitance monitoring bridge circuit for an enthalpy responsive device |
| 07/23/1990 | CA2007464A1 Cryoelectrosynthesis |
| 07/18/1990 | EP0377782A2 Method for the determination of the alcohol content and/or the calorific value of fuels |
| 07/17/1990 | CA1271840A1 Amplitude modulated electrical signal analysis circuit having a frequency converter |
| 07/10/1990 | CA1271524A1 Dielectric constant measuring apparatus |
| 07/04/1990 | EP0376782A1 Apparatus for measuring an electrical variable of chip-type electronic components |
| 07/04/1990 | CN1043571A Current sensing |
| 07/03/1990 | US4939681 Circuit simulation method for semiconductor device including field effect transistors |
| 06/28/1990 | WO1990007127A1 Device for automatically ascertaining capacitance, dissipation factor and insulation resistance of a plurality of capacitors |
| 06/28/1990 | WO1990007126A1 Means and method for measuring inductance |
| 06/27/1990 | EP0375375A1 Loop impedance tester |
| 06/27/1990 | EP0375366A2 Method and apparatus using a varying electromagnetic field for determining the nature, or a property of a non-metallic, conductive material |
| 06/27/1990 | CN1043393A Dielectric loss measurer by optical fibre and microcomputer |
| 06/22/1990 | CA2006602A1 Device for automatically ascertaining capacitance, dissipation factor and insulation resistance of a plurality of capacitors |
| 06/20/1990 | CA2005941A1 Method and apparatus using a varying electromagnetic field for determining the nature, or a property of a material |
| 06/19/1990 | US4935692 Vector ammeter having digital signal processing unit |
| 06/14/1990 | WO1990006519A1 Apparatus and method for current sensing |
| 06/06/1990 | EP0371020A1 Circuit for measuring variable inductance. |
| 06/05/1990 | US4931721 Device for automatically ascertaining capacitance, dissipation factor and insulation resistance of a plurality of capacitors |
| 06/05/1990 | US4931720 Arrangement for measuring transfer impedances of coaxial cables |
| 05/31/1990 | DE3837718A1 Device for testing the immunity to interference of electronic devices or systems |
| 05/30/1990 | CN2057761U Multi-functional ground wire resistance test unit |
| 05/30/1990 | CN1008217B Method and device for measuring the resistance of conductive gum or conductive plastic |
| 05/23/1990 | CN1008133B Capacitance measuring method and apparatus |
| 05/17/1990 | WO1990005299A1 Detection of non-metallic materials |
| 05/17/1990 | DE3838608A1 Process and arrangement for determining a process variable in the heat treatment of metal parts |
| 05/16/1990 | EP0368128A2 Circuit for an inductive sensor |
| 05/15/1990 | US4924702 Liquid level sensor |
| 05/10/1990 | DE3905856C1 Method and device for testing cable access connections |
| 05/09/1990 | CN1007932B Resistance box for measuring temp. |
| 05/09/1990 | CN1007927B Capacitive position sensor |
| 05/03/1990 | CA2001443A1 Fluid capacitance sensing means and method |
| 05/02/1990 | CN1041822A Glass container wall thickness inspecting machine |
| 05/02/1990 | CN1041821A Glass container wall thickness inspecting machine |
| 05/01/1990 | US4922201 Eddy current method for measuring electrical resistivity and device for providing accurate phase detection |
| 05/01/1990 | US4922182 Auto reactance compensated non-contacting resistivity measuring device |
| 05/01/1990 | US4922181 Apparatus for monitoring the dielectric constant of an article |
| 04/25/1990 | EP0364573A1 Electrochemically controlled superconductivity |
| 04/25/1990 | CN2056515U Current compensation type micro-capacitivity test device |
| 04/25/1990 | CN1041650A Glass container inspecting machine |
| 04/24/1990 | CA1268210A1 Method for the measurement of capacitances, in particular of low capacitances |
| 04/19/1990 | WO1990004167A1 Composition monitor and monitoring process using impedance measurements |
| 04/18/1990 | CN1041457A Apparatus for and method of measuring capacitance |
| 04/18/1990 | CN1041444A Bridge resistance measuring device for auget |
| 04/17/1990 | US4918376 A.C. capacitive gauging system |
| 04/17/1990 | CA1267950A1 Method and circuit arrangement for measuring the dynamical behavior of a rotating body |
| 04/17/1990 | CA1267934A1 Conductive emi test system, a decoupling network therefor |
| 04/12/1990 | DE3834464C1 Three-wire measuring circuit |
| 04/11/1990 | EP0363116A2 Glass container wall thickness inspection apparatus |
| 04/11/1990 | EP0363113A2 Glass container inspection apparatus |
| 04/11/1990 | CN1041216A Measurement of capacitance and parameters related thereto |
| 04/03/1990 | US4914394 Pocket-size time domain reflectometer |
| 03/29/1990 | DE3832367A1 Method for the electrostatic spray-coating of objects with enamel powder |
| 03/28/1990 | EP0360605A2 Apparatus for measuring capacitance |
| 03/28/1990 | EP0360109A1 Electrode line protective device |
| 03/28/1990 | CN2055244U Weak current digital ohmmeter for exploder |
| 03/27/1990 | US4912415 Sonde of electrodes on an earth drill for measuring the electric formation resistivity in earth strata |
| 03/27/1990 | US4911800 Electrochemically controlled superconductivity |
| 03/22/1990 | WO1990002923A1 Method and apparatus for measurement of capacitance and for capacitive measurement of displacement |
| 03/21/1990 | EP0261227A4 Capacitive sensor and metal detector for detecting concealed objects. |
| 03/20/1990 | US4910689 Resistivity value measuring circuit |
| 03/20/1990 | US4910453 Multi-probe grouping system with nonlinear error correction |
| 03/14/1990 | EP0358241A2 Method of determining inductivity of an inductive sensor |
| 03/06/1990 | US4906939 Device for automatically ascertaining capacitor breakdown voltage |
| 03/06/1990 | US4906921 Structure and process for testing integrated circuits permitting determination of the properties of layers |
| 03/06/1990 | US4906917 Elastomer degradation sensor using a piezoelectric material |
| 03/06/1990 | CA1266511A1 Apparatus for detecting degradation of an arrester |
| 03/06/1990 | CA1266510A1 Device for continuously measuring the linear density of a textile product |
| 03/01/1990 | DE3829427A1 Measuring instrument for determining the capacitance of a cable |
| 02/27/1990 | US4904927 Method for measuring a characteristic impedance and a propagation constant of a two-port network |
| 02/22/1990 | DE3828368A1 Conductance measuring device and its use |
| 02/20/1990 | US4901628 Hydraulic actuator having a microwave antenna |
| 02/15/1990 | DE3843877C1 Device for measuring the conductor resistances in insulated wires of electrical cables |
| 02/14/1990 | EP0354841A1 Appliance for monitoring the electric power disequilibrium in electric network lines or in an internal triphase installation |
| 02/14/1990 | EP0354269A1 Circuitry for monotoring the contact resistance of a potentiometer |
| 02/14/1990 | EP0354214A1 Process for determining the electrical duration of signal paths. |
| 02/13/1990 | US4901012 Circuit for measuring the dynamic characteristics of a package for high-speed integrated circuits and a method for measuring said dynamic characteristics |
| 02/13/1990 | US4899750 For stimulating body tissue |
| 02/07/1990 | EP0353793A1 Measurement of the position of an elongated element |
| 02/06/1990 | US4899102 Electrode system for a parallel plate dielectric analyzer |
| 01/31/1990 | EP0352940A2 Method of measuring specific contact resistivity of self-aligned contacts in integrated circuits |
| 01/31/1990 | EP0352507A2 Circuitry for establishing a parameter of a HF oscillator |
| 01/31/1990 | CN1006661B Capacity measuring circuit |
| 01/24/1990 | CN1039118A Automatic medium-loss and capacitance measure instrument for power plants |
| 01/23/1990 | US4896115 Electrical network insulation monitoring and measuring device |
| 01/23/1990 | US4896108 Test circuit for measuring specific contact resistivity of self-aligned contacts in integrated circuits |
| 01/23/1990 | US4896096 Reflected signal measurement blanking circuit |
| 01/17/1990 | CN2051356U Electronic megger |
| 01/16/1990 | US4894604 Fluid capacitance sensing means and method |
| 01/10/1990 | EP0350363A1 Process and appliance for determining the impedance of a discharge in a plasma reacteur |