| Patents for G01R 31 - Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere (152,264) |
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| 12/27/1990 | EP0403508A1 Device for testing printed circuit boards |
| 12/26/1990 | CN2068246U Energy-prestoring alternating current transmission line short-circuit grounding fault rod tower indicator |
| 12/26/1990 | CN1048103A Current leakage inspecting device for use in cathode ray tube |
| 12/26/1990 | CN1048102A Device for diagnosing electric power apparatus and method |
| 12/26/1990 | CA2018725A1 Test cell for non-contact opens/shorts testing of electrical circuits |
| 12/26/1990 | CA2017238A1 Method and apparatus for non-contact opens/shorts testing of electrical circuits |
| 12/25/1990 | US4980890 Semiconductor integrated circuit |
| 12/25/1990 | US4980889 Multi-mode testing systems |
| 12/25/1990 | US4980791 Universal power supply monitor circuit |
| 12/25/1990 | US4980745 Substrate potential detecting circuit |
| 12/25/1990 | US4980645 Method for diagnosing an insulation deterioration of a power cable |
| 12/25/1990 | US4980639 Method and apparatus for testing integrated electronic device |
| 12/25/1990 | US4980637 Test probe for testing a test device |
| 12/25/1990 | US4980586 Digital integrated circuit propagation delay regulator |
| 12/25/1990 | US4980573 Firing circuit with three crash sensors |
| 12/25/1990 | US4980570 Device for determining location of apertures |
| 12/25/1990 | US4979506 Self-test system and method for external programming device |
| 12/20/1990 | DE3920177A1 Earth connection detection for unearthed multiphase supply networks - charging network capacitance with DC and measuring isolation characteristics indirectly |
| 12/20/1990 | DE3919960A1 Binary signal line monitoring circuit - has resistors connecting lines to voltage supply, comparators and controlled reference source |
| 12/19/1990 | EP0403436A1 Device for testing digital circuits by means of adaptable clocking circuits included in the test |
| 12/19/1990 | EP0403206A2 Contact equipped with a bypass element |
| 12/19/1990 | EP0403093A2 Method and apparatus for synchronized sweeping of multiple instruments |
| 12/19/1990 | EP0402906A2 Method and apparatus for locating an abnormality in a gas-insulated electric device |
| 12/19/1990 | EP0402566A2 Method and device for localising transient arcing cable faults |
| 12/19/1990 | EP0402499A1 Process for testing a circuit board with a particle beam |
| 12/19/1990 | CN1010911B Arrangement for fault indication |
| 12/19/1990 | CN1010910B Battery-powered device |
| 12/19/1990 | CN1010909B Battery-powered device |
| 12/19/1990 | CN1010895B Generator stator winding diagnostic method |
| 12/18/1990 | US4979193 Method and apparatus for testing a binary counter |
| 12/18/1990 | US4979177 Enhanced counter/timer resolution in a logic analyzer |
| 12/18/1990 | US4979172 Microcomputer |
| 12/18/1990 | US4978915 Method of manufacturing semiconductor devices involving the detection of impurities |
| 12/18/1990 | US4978913 Apparatus for measuring characteristics of chip electronic components |
| 12/18/1990 | US4978910 Electrooptic apparatus for the measurement of ultrashort electrical signals |
| 12/18/1990 | US4978909 Demodulation circuit for AC motor current spectral analysis |
| 12/18/1990 | US4978908 Scanning electron microscope based parametric testing method and apparatus |
| 12/18/1990 | US4978592 Universal electrolyte level indicator for wet cell batteries |
| 12/18/1990 | US4978220 Compensating system for inspecting potentially warped printed circuit boards |
| 12/13/1990 | WO1990015517A1 Improved electrical connectors and ic chip tester embodying same |
| 12/13/1990 | WO1990015340A1 Process and device for rapid spectral analysis of a signal at one or more measurement points |
| 12/13/1990 | DE4004750A1 Identifying signal line connected to known line via short circuit - by applying probe to faulty line to detect signals as digital levels are applied to PCB inputs |
| 12/13/1990 | CA2018705A1 Contact equipped with a bypass element |
| 12/12/1990 | EP0402286A1 Method for testing electrical circuits of vehicles using a shunt and a control device |
| 12/12/1990 | EP0402134A2 Delay fault testing apparatus |
| 12/12/1990 | EP0401852A2 Surface microscope |
| 12/12/1990 | EP0401848A2 Tape carrier and test method therefor |
| 12/12/1990 | EP0401299A1 A monitoring system. |
| 12/12/1990 | CN2067413U Aerial cable fault wireless detector |
| 12/12/1990 | CN2067410U Angle-of-flow measurer for three phase thyristor |
| 12/11/1990 | US4977531 Apparatus for automatic preparation of measurement programs |
| 12/11/1990 | US4977530 Voltage monitor for in-circuit testing |
| 12/11/1990 | US4977514 For a logic analyzer |
| 12/11/1990 | US4977478 Contact status detector |
| 12/11/1990 | US4977393 Method and apparatus for monitoring the condition of charge of a battery connected to an appliance and including counters counted with respect to the time and drain of the battery |
| 12/11/1990 | US4977389 Indicator and method of indicating trouble |
| 12/11/1990 | US4977371 Variable frequency I-V measurement system |
| 12/11/1990 | US4977353 Communication system for single point emergency lighting |
| 12/11/1990 | US4976626 Contact pin |
| 12/11/1990 | CA1277773C Method for testing conductor networks |
| 12/11/1990 | CA1277711C Apparatus and method of stimulating an equipment |
| 12/11/1990 | CA1277706C Automatic short circuit tester control device |
| 12/11/1990 | CA1277705C Apparatus for detecting faulty power line insulator |
| 12/08/1990 | WO1990015316A1 Computer-aided engine diagnostic system |
| 12/06/1990 | DE3918116A1 Monitoring function of turbogenerator rectifier - indirectly sensing commutation performance and analytically locating individual faults on rotary rectifiers |
| 12/05/1990 | EP0400876A2 Method and apparatus for testing circuit boards |
| 12/05/1990 | EP0400849A2 Method and apparatus for measuring the voltage and charge of a battery |
| 12/05/1990 | EP0400405A2 Apparatus and method for diagnosis of power appliances |
| 12/05/1990 | EP0400387A2 Process to make a large-area electrolytical contact on a semiconductor body |
| 12/05/1990 | EP0400386A2 Process for determining the recombination velocity of minority charges at the borders between semiconductors and other substances |
| 12/05/1990 | EP0400373A2 Method for the spatial determination of the diffusion length of minority charge carriers in a semiconductive crystal body with the aid of an electrolytic cell |
| 12/05/1990 | EP0400230A1 System for detecting fault location in substation |
| 12/05/1990 | EP0400179A1 Semi-conductor memory internal parallel test method and apparatus |
| 12/05/1990 | EP0400094A1 Test fixture for tab circuits and devices |
| 12/05/1990 | CN2066992U Test instrument for thunder and lighting counter |
| 12/05/1990 | CN2066989U Multifunctional multimeter |
| 12/04/1990 | USH862 Method of indicating the state of change of a battery using a light emitting diode (LED) clock connected to the battery |
| 12/04/1990 | US4975847 Diagnosis system for a motor vehicle |
| 12/04/1990 | US4975800 Contact abnormality detecting system |
| 12/04/1990 | US4975685 Guide path short detector |
| 12/04/1990 | US4975641 Integrated circuit and method for testing the integrated circuit |
| 12/04/1990 | US4975639 Test head with improved shielding |
| 12/04/1990 | US4975637 Method and apparatus for integrated circuit device testing |
| 12/04/1990 | US4975079 Connector assembly for chip testing |
| 12/04/1990 | CA1277433C Processing pulse control circuit for use in device performing signature analysis of digital circuits |
| 11/28/1990 | EP0399240A2 Semiconductor memory device |
| 11/28/1990 | EP0399207A2 Test selection system |
| 11/28/1990 | CN2066589U Tester for operaitng wave of distribution transformer |
| 11/28/1990 | CN2066588U Tester for electric discontinuity of cable |
| 11/28/1990 | CN2066587U Simulant for ac power supply interference |
| 11/28/1990 | CN2066586U Tester for head lamp circuit faults of motor-driven vehicle |
| 11/28/1990 | CN2066585U Circuit tester for multifunctional motor-driven vehicle |
| 11/27/1990 | US4974226 Circuit for testing integrated circuits |
| 11/27/1990 | US4974184 Maximum length pseudo-random test pattern generator via feedback network modification |
| 11/27/1990 | US4973948 Reversed or missing lead frame detector |
| 11/27/1990 | US4973912 Method for contactless measurement of a resistance arranged in the secondary circuit of a transformer and device for carrying out the method |
| 11/27/1990 | US4973911 Apparatus for electromagnetic compatibility testing |
| 11/27/1990 | US4973904 Test circuit and method |
| 11/27/1990 | US4973256 Device under test interface board and test electronic card interconnection in semiconductor test system |
| 11/27/1990 | US4973015 Manipulator apparatus for test head support and orientation |