| Patents for G01R 29 - Arrangements for measuring or indicating electric quantities not covered by groups (11,937) |
|---|
| 09/05/1978 | CA1038035A1 Microwave alarm |
| 08/22/1978 | US4109206 Signal strength meter drive circuit |
| 08/15/1978 | US4107651 Glitch detector |
| 08/15/1978 | US4106869 Distance compensated electrostatic voltmeter |
| 08/08/1978 | US4106096 Derivative measurement by frequency mixing |
| 08/08/1978 | US4105980 Glitch filter circuit |
| 08/01/1978 | US4104586 Apparatus for indicating the sequence of alternating current signals |
| 08/01/1978 | US4104545 Pulse peak detector circuit |
| 07/25/1978 | US4103231 Electrometric apparatus |
| 07/25/1978 | US4103230 Apparatus for analyzing electrical signals of variable amplitude |
| 07/18/1978 | US4101825 Electric field sensor |
| 07/11/1978 | US4100484 D.C. Electrometer |
| 07/11/1978 | US4100442 Electrically driven oscillating capacitor device |
| 07/11/1978 | US4099407 Method for measuring the pre-stress in hoop-bound anuluses of rectangular cross-section and made of piezoelectric ceramic material |
| 07/04/1978 | US4099075 Signal detection apparatus using an adaptive threshold |
| 07/04/1978 | US4099042 Applicator for applying microwaves |
| 06/20/1978 | US4096395 Automatic transfer control device and voltage sensor |
| 06/13/1978 | US4095221 Electrical storm forecast system |
| 06/13/1978 | US4095125 Pulse signal detector and/or filter |
| 06/06/1978 | US4093995 Random access memory apparatus for a waveform measuring apparatus |
| 05/30/1978 | US4092538 Device for checking the irradiation dose measuring circuits used to measure the irradiation doses delivered by a radiotherapy apparatus |
| 05/30/1978 | US4091818 Cardiac pacing apparatus with electromagnetic interference protection |
| 05/23/1978 | US4091327 Broadband isotropic antenna with fiber-optic link to a conventional receiver |
| 05/23/1978 | US4091326 Method and apparatus for equipotential plane detection |
| 05/09/1978 | US4088948 Single tone technique for measuring IM distortion |
| 04/11/1978 | US4084131 Process and apparatus for the determination of the inversion temperature of a quartz piezoelectric resonator element |
| 04/04/1978 | US4083006 Loop type standard magnetic field generator |
| 04/04/1978 | US4082218 Potential failure detecting circuit having improved means for detecting transitions in short duration signals |
| 03/14/1978 | US4079315 Method and apparatus for measuring time interval between two pulse signals |
| 02/14/1978 | US4074358 Test set for measuring jitter distortion of data pulses |
| 02/14/1978 | US4074201 Signal analyzer with noise estimation and signal to noise readout |
| 02/07/1978 | US4072896 Apparatus for measuring the electron escape potential of metal surfaces |
| 01/24/1978 | US4070621 Antenna with electro-optical modulator |
| 01/24/1978 | US4070615 Compensation indicator for attenuation probe |
| 01/10/1978 | US4068176 Direct reading sinad meter |
| 01/10/1978 | US4068165 Circuit for determining the slope of a signal |
| 01/03/1978 | US4067053 Active symmetrical component sequence filter |
| 01/03/1978 | US4066951 Apparatus for calibrating moisture measuring instrument |
| 12/27/1977 | US4065664 Floating point registers for programmed digital instruments |
| 12/27/1977 | US4065655 Microwave leakage indicator strip |
| 12/20/1977 | US4064539 Device for measuring quantities of electric charges or similar electric parameters |
| 12/20/1977 | US4064456 Meter box assembly |
| 12/13/1977 | US4063180 Noise detecting circuit |
| 12/13/1977 | US4063155 D.C. Electrometer probe |
| 12/13/1977 | US4063154 D. C. electrometer |
| 12/13/1977 | US4062632 Constant modulation index technique for measuring the derivatives of device parameters |
| 10/25/1977 | US4055842 Digital device for measuring single and multiple impact impulses |
| 10/25/1977 | US4055798 Rotary electric field intensity measuring device |
| 10/18/1977 | US4054835 Rapid response generating voltmeter |
| 10/11/1977 | US4053888 Arrangement for measuring the lag between two timed signals by electronic correlation |
| 10/11/1977 | US4053876 Alarm system for warning of unbalance or failure of one or more phases of a multi-phase high-current load |
| 10/11/1977 | US4053875 Static charge detector having fail-safe voltage surge protection means |
| 10/11/1977 | US4053823 Ignition arc monitor circuit |
| 10/04/1977 | US4052676 Digital-analog frequency error signaling |
| 09/27/1977 | US4051432 Attenuator for measuring high voltage fast rise time pulses |
| 09/20/1977 | US4050014 Circuit arrangement for measuring the phase modulation disturbance of a test signal |
| 09/06/1977 | US4047113 Feedback circuitry for charge digitizer |
| 08/30/1977 | US4045732 Device for sensing the operative status of electrical equipment |
| 08/23/1977 | US4044303 Microwave radiation detector |
| 08/16/1977 | US4042881 Voltage measuring device having an amplifier in the probe |
| 08/09/1977 | US4041375 Apparatus for measuring content of moving dielectric materials moisture |
| 08/02/1977 | US4039953 Automatic aerial attenuator |
| 08/02/1977 | US4039942 System for sensing electrical potential particularly in plants |
| 08/02/1977 | US4039937 Acoustic test apparatus for electrical networks including multi-phase power systems |
| 07/19/1977 | US4037150 Method of and apparatus for eliminating the effect of non-equipotentiality voltage on the hall voltage |
| 07/05/1977 | US4034285 Superheterodyne noise measuring discriminators |
| 07/05/1977 | US4033176 Pocket-sized, direct-reading ultrasonic thickness gauge |
| 06/28/1977 | US4032910 Portable |
| 05/24/1977 | US4025913 Electrical field sensing and transmitting apparatus |
| 05/24/1977 | US4025849 Method of measuring analog input voltages through isolation transformers and apparatus for the same |
| 05/24/1977 | US4025844 Granular superconducting quantum interference device and apparatus including same |
| 05/17/1977 | US4023563 Apparatus and method for determining onset times of pulses and use thereof in computing interarterial blood pressure electromechanical interval |
| 05/17/1977 | US4023408 Stormscope |
| 05/17/1977 | US4023396 Impact impulse measuring device |
| 05/10/1977 | US4023101 Multiple function electrical measuring and indicating apparatus |
| 05/10/1977 | US4023093 Magnetic field radiation detector |
| 04/19/1977 | US4019147 Band pass filter for impulse operation |
| 04/05/1977 | US4016569 Near field antenna boresight alignment apparatus |
| 03/29/1977 | US4015211 Dual channel pulse width detector having delay and D.C. offset means therein |
| 03/29/1977 | US4015210 Circuit for detecting predetermined voltage level crossings of the modulating component of a frequency modulated signal |
| 03/22/1977 | US4013955 Analog signal processor |
| 03/01/1977 | US4010418 Transistor circuits |
| 02/08/1977 | US4007418 Personal electrostatic safety monitor with induction plate sensing means |
| 01/25/1977 | US4005436 Apparatus for making a recording of an electrostatic charge pattern |
| 01/25/1977 | US4005357 Electrostatic field sensor |
| 01/25/1977 | US4004450 Device for measuring impact pulses |
| 01/18/1977 | US4004227 Radio frequency interference (RFI) testing by the dual screen room technique |
| 01/11/1977 | US4002979 Pulse comparator |
| 01/04/1977 | US4001675 Test set for measuring impedance and power dissipation of a crystal |
| 01/04/1977 | US4000652 Method and device for measuring the correction factor |
| 12/21/1976 | US3999119 Measuring toner concentration |
| 12/21/1976 | US3999087 Missing phase detection circuit for use with three-phase power sources |
| 12/21/1976 | US3999061 Radiant energy integrating meter |
| 12/14/1976 | USRE29079 Multiplier, divider and wattmeter using a switching circuit and a pulse-width and frequency modulator |
| 12/14/1976 | US3997842 Method and apparatus for monitoring modulation devices for video signals |
| 12/14/1976 | US3997798 Or pulse gaps whose duration is shorter than a given test period t(p) from a sequence of digital pulses present at the input end |
| 11/30/1976 | US3995216 Technique for measuring surface states in metal-insulator-semiconductor structures |
| 11/30/1976 | US3995178 Pulse-width and frequency modulator circuit |
| 11/30/1976 | US3995105 Apparatus for automatic measurement of the video-signal-to-noise ratio in a television channel |
| 11/23/1976 | US3992760 Apparatus and process for measuring the resonant frequency and coefficient of coupling of a plurality of coupled piezoelectric resonators |