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Class Information
Number: 702/77
Name: Data processing: measuring, calibrating, or testing > Measurement system in a specific environment > Electrical signal parameter measurement system > Waveform analysis > Frequency > Frequency spectrum > Using fourier method
Description: Subject matter wherein the frequency spectrum is analyzed or determined using Fourier analysis or Fourier transform technique.










Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
6751564 Waveform analysis Jun. 15, 2004
6732058 Method and apparatus for computation reduction for tone detection May. 4, 2004
6725723 Device for mounting on a machine Apr. 27, 2004
6721445 Method for detecting anomalies in a signal Apr. 13, 2004
6708128 Device, computer program product and method for indicating a function deviation of one or more details of manufacturing equipment using frequency component analysis Mar. 16, 2004
6708127 Beam propagation method for step-index waveguides Mar. 16, 2004
6697746 Control system for a failure mode testing system Feb. 24, 2004
6690977 Data processor and data processing method for wavemeter Feb. 10, 2004
6691051 Transient distance to fault measurement Feb. 10, 2004
6678622 FFT based digital radiometer Jan. 13, 2004
6662125 Electromagnetic wave analyzer and program for same Dec. 9, 2003
6651016 Jitter-corrected spectrum analyzer Nov. 18, 2003
6577966 Optimal ratio estimator for multisensor systems Jun. 10, 2003
6577968 Method of estimating signal frequency Jun. 10, 2003
6574573 Spectrum analysis and display method time series Jun. 3, 2003
6549862 Vector network analyzer architecture based on sliding correlator techniques Apr. 15, 2003
6545485 Ultrasonic pinpointer for power system sources of interference Apr. 8, 2003
6512788 RF output spectrum measurement analyzer and method Jan. 28, 2003
6499349 Condition analyzer Dec. 31, 2002
6484112 Method for estimating the frequency of a time signal Nov. 19, 2002
6484111 Real time signal analyzer Nov. 19, 2002
6469488 Method of processing a high frequency signal containing multiple fundamental frequencies Oct. 22, 2002
6453253 Impulse response measuring method Sep. 17, 2002
6438513 Process for searching for a noise model in noisy audio signals Aug. 20, 2002
6434496 Method and apparatus for measuring light absorption spectra Aug. 13, 2002
6430519 Method for evaluating an input data signal and circuit system for carrying out said method Aug. 6, 2002
6408696 Coherent phase line enhancer spectral analysis technique Jun. 25, 2002
6397154 Correlation method for surveillance device detection May. 28, 2002
6397158 Method for determining capacitance values for quieting noisy power conductors May. 28, 2002
6388439 Method and device for measuring in situ the gap between two given elements in a tubular pipe May. 14, 2002
6369738 Time domain/frequency domain data converter with data ready feature Apr. 9, 2002
6366864 Adaptive sampling rate based on power system frequency Apr. 2, 2002
6347286 Method and device operating by interpolation in a discrete spectrum to determine characteristics of a signal and application thereof Feb. 12, 2002
6298309 Current based frequency tracking method and apparatus Oct. 2, 2001
6292760 Method and apparatus to measure non-coherent signals Sep. 18, 2001
6276536 Method of measuring ripeness and texture of vegetable or fruit and measuring instrument Aug. 21, 2001
6275781 Vibration data processor and processing method Aug. 14, 2001
6236951 Sensor interrogation May. 22, 2001
6233529 Frequency spectrum analyzer having time domain analysis function May. 15, 2001
6233530 Control system for a failure mode testing system May. 15, 2001
6208946 High speed fourier transform apparatus Mar. 27, 2001
6173216 Protective relay with improved, sub-window cosine filter Jan. 9, 2001
6108610 Method and system for updating noise estimates during pauses in an information signal Aug. 22, 2000
6104984 Automated method of frequency determination in software metric data through the use of the multiple signal classification (MUSIC) algorithm Aug. 15, 2000
6094968 Continuous emissions monitoring system Aug. 1, 2000
6026418 Frequency measurement method and associated apparatus Feb. 15, 2000
6006170 Method and system for ascertaining anomalies in electric motors Dec. 21, 1999
6002232 Robust vibration suppression methods and systems Dec. 14, 1999
5992237 Digital vibration coupling stud Nov. 30, 1999
5995914 Method and apparatus for asynchronously measuring frequency shifted signals Nov. 30, 1999

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