| Patents for G01R 35 - Testing or calibrating of apparatus covered by the other groups of this subclass (8,105) |
|---|
| 02/07/1991 | WO1991001502A1 Method and apparatus for photoinductive imaging |
| 01/29/1991 | US4989155 Intelligent power monitor |
| 01/22/1991 | CA2021531A1 Method and apparatus for photoinductive imaging |
| 01/22/1991 | CA2021530A1 Method and apparatus for photoinductive imaging |
| 01/16/1991 | EP0407639A1 Method of preadjusting electronic circuits |
| 01/01/1991 | US4982164 Method of calibrating a network analyzer |
| 12/19/1990 | CN2067837U Composite error monitor for electric power metering instruments |
| 12/04/1990 | US4975573 Optical test bench |
| 11/20/1990 | CA1276677C Load loss standard for testing and calibrating high voltage power measuring system |
| 10/30/1990 | US4967173 Short airline calibration standards and methods for error-corrected microwave network analysis |
| 10/10/1990 | EP0390886A1 Setting up of quadrature signals. |
| 09/18/1990 | US4958294 Swept microwave power measurement system and method |
| 09/18/1990 | US4958139 Method and apparatus for automatically calibrating the gain and offset of a time-shifted digitizing channel |
| 09/05/1990 | CN2061699U Voltage transformer for emulate voltage load box |
| 09/04/1990 | US4954782 Self-checking ohmmeter that checks for contact resistance of its probes |
| 09/04/1990 | CA1273678A1 Calibrated automatic test system |
| 08/21/1990 | US4950990 Method and apparatus for photoinductive imaging |
| 08/15/1990 | CN2060555U Portable automatic checker for electric meter |
| 08/14/1990 | US4949029 Adjustment circuit and method for solid-state electricity meter |
| 08/08/1990 | EP0380979A2 Phased locked loop to provide precise frequency and phase tracking of two signals |
| 08/07/1990 | US4947355 Modular electronic instrument system having automated calibration capability |
| 08/01/1990 | EP0380046A2 Method for testing counters, in particular electricity, water or gas meters, and device for carrying out this method |
| 07/25/1990 | EP0378670A1 Adjustment circuit and method for solid-state electricity meter |
| 06/26/1990 | US4937535 Calibration method and programmable phase-gain amplifier |
| 06/13/1990 | CN1043003A Adjustment circuit and method for solid-state electricity meter |
| 06/12/1990 | US4933631 Digital AC meter |
| 06/05/1990 | US4931742 Electrical system |
| 05/09/1990 | EP0366999A1 Appliance for calibrating and testing ring-shaped current tongs |
| 05/09/1990 | EP0366651A1 Calibration system for blood pressure transducer. |
| 05/02/1990 | EP0366360A1 Proving apparatus & method for high voltage detectors |
| 05/02/1990 | CA2001258A1 Device for calibrating and testing ring-shaped current clamps |
| 04/11/1990 | CN2055943U Constant value current automatic controller |
| 04/04/1990 | EP0361656A1 Method and apparatus for testing transducers |
| 03/28/1990 | EP0360511A2 Electric energy metering |
| 03/22/1990 | WO1990002956A1 Setting up of quadrature signals |
| 03/15/1990 | DE3912654A1 Charge injector calibrating partial discharge measurement circuits - has charge storage capacitor supplied by recharge device and short duration switch |
| 03/07/1990 | CN1007091B Method and device for directly reading and ckecking dc mutual inductor comparison value difference |
| 02/28/1990 | EP0355559A1 Monitoring circuitry for an electronic electricity counter |
| 02/20/1990 | US4903024 A/D converter system with error correction and calibration apparatus and method |
| 02/20/1990 | US4902986 Phased locked loop to provide precise frequency and phase tracking of two signals |
| 02/07/1990 | CN2052540U Pulse response calibrater of interference measuring instrument for all-frequency band |
| 01/30/1990 | CA1265197A1 Potential indicating device |
| 01/25/1990 | WO1990000740A1 Adjustment circuit and method for solid-state electricity meter |
| 01/23/1990 | US4896282 Flow computer calibration technique |
| 01/11/1990 | DE3822051A1 Current transducer circuit for meter testing devices |
| 01/03/1990 | EP0349328A2 Self-adjusting oscilloscope |
| 12/27/1989 | EP0348123A1 Method and apparatus for automatically calibrating the gain and offset of a time-shifted digitizing channel |
| 12/20/1989 | CN2049777U Auto-controller for electricity meter checking stand |
| 12/13/1989 | CN2049366U Multifunction tester for camera's flashlight |
| 12/06/1989 | EP0344479A1 Optical indicator of the operational status of an energy supply network conductor which is inaccessible due to insulation or encapsulation |
| 12/06/1989 | CN2048978U Calibrator for single and three phase electricity meter |
| 11/09/1989 | DE3813656A1 Arrangement for an electricity meter with audio-frequency ripple control receiver integrated in the meter housing |
| 11/08/1989 | EP0340749A2 Modular electronic instrument system having automated calibration capability |
| 11/08/1989 | CN2047391U Plug-in device for testing kilowatt-hour meter |
| 11/02/1989 | EP0339286A2 Test system for acquiring, calculating and displaying representations of data sequences |
| 11/02/1989 | DE3912795A1 Method for calibrating a network analyser |
| 10/25/1989 | CN2046638U High-stability power source |
| 10/24/1989 | US4876515 Self-checking ohmmeter that checks for contact resistance of its probes |
| 10/24/1989 | US4875859 Method and apparatus for guiding a user during setup of a signal measurement system |
| 10/03/1989 | US4871993 Self-diagnostic apparatus for vehicle meter |
| 09/20/1989 | EP0333521A1 System for setting reference reactance for vector corrected measurements |
| 09/12/1989 | US4866366 Negative feedback power supply apparatus |
| 09/07/1989 | DE3806238A1 Device for the highly accurate technical determination of the radio-frequency properties of microstrip circuit components, and arrangements for calibrating the device |
| 08/29/1989 | CA1258883A1 Probe body for an electrical measurement system |
| 08/23/1989 | EP0328525A1 System enabling the electrical balancing of transducers arranged in inking heads. |
| 08/22/1989 | US4859936 Method of and apparatus for determining AC calibration errors and apparatus using device with AC calibration errors |
| 08/15/1989 | US4858160 System for setting reference reactance for vector corrected measurements |
| 08/15/1989 | US4858159 Frequency-tuneable filter calibration |
| 08/15/1989 | US4857827 Electronic load for testing transformers |
| 08/09/1989 | CN2042600U Digital display self-balance mutual-inductor testing and calibrating instrument |
| 08/01/1989 | US4853613 Calibration method for apparatus evaluating microwave/millimeter wave circuits |
| 08/01/1989 | CA1258093A1 Trouble detecting circuit for resistive sensor type indicator |
| 07/19/1989 | EP0324600A1 Method and apparatus for guiding a user during setup of a signal measurement system |
| 07/18/1989 | US4849686 Method of and arrangement for accurately measuring low capacitances |
| 07/05/1989 | EP0323153A1 Coaxial Electrical Connector |
| 07/04/1989 | US4845423 Electrically short air line for network analyzer calibration |
| 06/27/1989 | US4843306 Replaceable resistors for calibrating a watthour meter |
| 06/20/1989 | US4841497 Digital time base with corrected analog interpolation |
| 06/20/1989 | US4841229 Method of and circuit for ohmmeter calibration |
| 06/14/1989 | CN1033421A Method of and circuit for ohmmeter calibration |
| 06/13/1989 | US4839819 Intelligent power monitor |
| 06/06/1989 | US4837504 Electricity meter and method of calibrating same |
| 05/31/1989 | EP0318461A2 Measuring circuit device |
| 05/17/1989 | EP0315834A1 Meter with two tarif counters for the separate calculation of the current usage of two user groups |
| 05/09/1989 | US4829236 Digital-to-analog calibration system |
| 05/05/1989 | WO1989004001A1 Calibrating method for apparatus evaluating microwave/millimeter wave circuits |
| 05/02/1989 | US4827437 Auto calibration circuit for VLSI tester |
| 04/25/1989 | US4824378 System for the programming of a measuring instrument installed in an automotive vehicle |
| 04/19/1989 | CN2036278U Portable instrument checker |
| 03/28/1989 | US4817045 Monitored control arrangement |
| 03/28/1989 | US4816767 Vector network analyzer with integral processor |
| 03/21/1989 | US4814933 Potential indicating device |
| 03/09/1989 | DE3743064A1 Electrical service installation |
| 02/23/1989 | DE3727122A1 Method and arrangement for adjusting (balancing) a current controller |
| 02/22/1989 | CN1031281A Error monitor for watthour meter |
| 02/21/1989 | US4806765 Method and apparatus for checking the signal path of a measuring system |
| 01/31/1989 | CA1249631A1 Calibrated power detector |
| 01/26/1989 | WO1989000399A1 Calibration system for blood pressure transducer |
| 01/17/1989 | US4799008 AC level calibration apparatus |
| 01/11/1989 | EP0298411A2 Self diagnostic apparatus for vehicle meter |