| Patents for G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937) |
|---|
| 08/26/1980 | US4219777 Detector for multiplicity of radio wave frequencies |
| 08/21/1980 | WO1980001742A1 Interphase unbalance detector for ac load circuit |
| 08/20/1980 | EP0014687A1 Process for determining stresses by measuring and analyzing piezo-electric potentials produced in a solid organic material, apparatus for carrying out the process and use therefor |
| 08/19/1980 | US4218736 Effective value measuring apparatus |
| 08/19/1980 | US4218683 Range focus lens |
| 08/12/1980 | CA1083670A1 Apparatus for detection of synchronism by means of vector difference measurement |
| 08/07/1980 | WO1980001536A1 Process for measuring and analysing potentials of piezo-electrical origin generated by a rigid member of organic material |
| 08/05/1980 | US4216429 Method and apparatus for quantitatively measuring the reception quality of a received frequency-modulated ultrashort-wave signal |
| 08/05/1980 | US4216388 Narrow pulse eliminator |
| 08/05/1980 | CA1083218A1 Waveform analyzer for rotating electrical circuitry |
| 07/29/1980 | CA1082780A1 Sensor for electromagnetic waves caused by nuclear detonation |
| 07/29/1980 | CA1082776A1 Apparatus for monitoring an a-c variable |
| 07/22/1980 | US4214210 Electromagnetic noise source locator |
| 07/22/1980 | US4214177 Monitoring circuit |
| 07/01/1980 | US4210948 Method and apparatus for monitoring line voltage in a polyphase source |
| 07/01/1980 | CA1080804A1 D. c. electrometer |
| 06/24/1980 | US4209835 Pulse repetition interval autocorrelator system |
| 06/17/1980 | US4208629 Static electricity indicator |
| 06/17/1980 | US4208626 Precision timing source for multiple rate sampling of high-speed waveforms |
| 06/11/1980 | EP0011699A1 Circuit for measuring the phase jitter of digital signals, and its use |
| 06/10/1980 | US4207534 Fast redundant pulse density analyzer |
| 06/10/1980 | US4207518 Broadband radiation detector with diode elements |
| 05/27/1980 | US4205267 High speed electrostatic voltmeter |
| 05/27/1980 | CA1078458A1 Compensation indicator for attenuation probe |
| 05/20/1980 | US4204164 Noise detector circuit |
| 05/06/1980 | US4201987 Method for determining antenna near-fields from measurements on a spherical surface |
| 04/30/1980 | EP0010109A1 Method and arrangement for indicating the reception quality of a frequency modulated very high frequency signal |
| 04/22/1980 | US4199716 Microwave hazard alarm |
| 04/22/1980 | US4199715 Method and apparatus for defining an equipotential line or _surface in the earth's atmosphere and measuring the misalignment of a _selected line or plane relative to an equipotential line or surface |
| 04/16/1980 | EP0009735A1 Apparatus for detecting opposite phase and open phase |
| 04/15/1980 | US4198606 Tuning apparatus |
| 04/15/1980 | US4198599 Gated lightning detection system |
| 04/15/1980 | US4197737 Multiple sensing device and sensing devices therefor |
| 04/08/1980 | US4197561 Portable recorder apparatus for recording time-related data |
| 04/08/1980 | US4197493 Electrostatic voltmeter |
| 04/01/1980 | US4196393 Microwave signal detector |
| 04/01/1980 | US4196378 Circuit for detecting a positive phase or an opposite phase in three phase alternating power source |
| 03/25/1980 | US4195262 Apparatus for measuring microwave electromagnetic fields |
| 03/18/1980 | US4194148 Measuring apparatus for measuring a charging degree of liquid |
| 03/18/1980 | US4193393 Diagnostic apparatus |
| 03/11/1980 | CA1073552A1 Constant modulation index technique for measuring the derivatives of device parameters |
| 02/19/1980 | CA1072198A1 Automatic transfer control device and voltage sensor |
| 02/06/1980 | EP0007677A1 Circuit for the supervision of the variation of the potentials on several lines |
| 01/22/1980 | US4185242 Signal-to-noise ratio measurement of intermittent signals |
| 12/25/1979 | US4180773 Voltage phase testing and indicating device |
| 12/18/1979 | US4179625 Noise pulse presence detection circuit |
| 12/11/1979 | US4178541 Apparatus for testing the operation of a device controlling the ignition of an internal combustion engine |
| 12/04/1979 | US4177424 Methods of and a circuit for monitoring the amplitude of sine wave-shaped signals |
| 12/04/1979 | US4177422 Apparatus and process for generating an ionized gas or plasma by microwave energy |
| 11/27/1979 | CA1067202A1 Moving dipole receives test signal in radiation pattern determination system |
| 11/20/1979 | US4175258 High level white noise generator |
| 11/06/1979 | CA1065967A1 Attenuator for measuring high voltage fast rise time pulses |
| 10/23/1979 | CA1065017A1 Digital-analog frequency error signaling |
| 09/25/1979 | US4169290 Data recording method and apparatus |
| 09/25/1979 | CA1063259A1 Device for checking the irradiation dose measuring circuits used to measure the irradiation doses delivered by a radiotherapy apparatus |
| 09/18/1979 | US4168467 Measurement of pulse duration |
| 08/07/1979 | CA1060099A1 Magnetic field radiation detector |
| 07/24/1979 | US4162453 Duration range determination of incursions by a variable signal |
| 06/19/1979 | US4158805 Method and apparatus for testing crystal elements |
| 05/22/1979 | US4156186 Method and apparatus for determining negative sequence current in a multi-phase dynamoelectric machine |
| 05/08/1979 | CA1054225A1 Phase sequence detector for three-phase ac power system |
| 05/01/1979 | US4152656 Apparatus for monitoring an AC variable |
| 05/01/1979 | US4152642 Signal analysis |
| 04/17/1979 | US4150412 Filter excitation circuitry |
| 04/17/1979 | US4150310 Track and hold circuit |
| 04/10/1979 | US4149119 Combined AC-DC electrometer with AC feedback for drift compensation |
| 04/03/1979 | US4147981 Electrostatic voltmeter probe positioned on the outside of a housing and vibrated by a piezoelectric transducer within the housing |
| 04/03/1979 | US4147979 Movable probe carrying optical waveguides with electro-optic or magneto-optic material for measuring electric or magnetic fields |
| 03/27/1979 | US4146913 Symmetrical component sequence filter |
| 03/20/1979 | US4145653 Waveform analyzer for rotating electrical circuitry |
| 02/13/1979 | US4139816 Copy paper test apparatus |
| 02/13/1979 | US4139813 Adaptor for an electrometer probe to permit contact potential measurements and method for using same |
| 01/10/1979 | EP0000318A1 Semiconductor field-effect sensor for an electric or magnetic field |
| 01/09/1979 | US4134137 Single wire microelectrometer imaging system |
| 01/02/1979 | US4133018 Thyristor fault-detecting apparatus |
| 01/02/1979 | US4132992 Radiator/circuit incorporating a cross slot waveguide antenna array which will instantaneously measure the radiation axial ratio or degree of linear polarization of any antenna |
| 01/02/1979 | US4132947 Waveshape detector |
| 12/19/1978 | US4130798 Unimeter for detection and indication of electric charge variation |
| 12/12/1978 | US4129880 Channel depletion boundary modulation magnetic field sensor |
| 12/12/1978 | US4129831 Circuit arrangement for determining and analyzing the phase interference-modulation of a measuring signal |
| 12/12/1978 | US4129830 Counting process for time-to-digital converting circuits |
| 12/12/1978 | US4129827 Amplitude probability detector |
| 12/05/1978 | US4128892 Pulse width measurement circuitry |
| 12/05/1978 | US4128812 Phase discriminator |
| 12/05/1978 | US4128810 Signal level indicator driving circuit |
| 11/28/1978 | US4127809 Pulse modulated wave measuring device |
| 11/28/1978 | US4127806 Shielded electrometer whose output is used to control width of pulses fed back to the shield and associated battery test circuitry |
| 11/28/1978 | CA1043429A1 Digital noise discriminator |
| 11/14/1978 | US4125884 Apparatus for detecting subsynchronous current in power systems |
| 10/17/1978 | US4121154 Alternating current potential measuring device |
| 10/17/1978 | US4121111 Apparatus for detection of synchronism by means of vector difference measurement |
| 10/10/1978 | CA1040267A1 Automatic zeroing electrometer |
| 10/03/1978 | US4118668 R.F. Network antenna analyzer employing sampling techniques and having remotely located sampling probes |
| 09/26/1978 | US4117348 Multi-phase clock monitor circuit |
| 09/19/1978 | US4115782 Microwave antenna system |
| 09/19/1978 | US4115732 Detection system for lightning |
| 09/12/1978 | US4114106 Arrangement to indicate signals having a length exceeding a limit value |
| 09/12/1978 | US4114088 Atmospheric ion density measurement |
| 09/12/1978 | US4114050 Integrating circuit |
| 09/05/1978 | US4112317 Pulse amplitude and width detection system |