Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7268696 | Directional signal and noise sensors for borehole electromagnetic telemetry system An electromagnetic borehole telemetry system providing improved signal to noise ratio. Adaptive filters use noise channels as references to remove noise from the signal channel. Directional detectors provide a signal channel with reduced noise content and improved n... | 09/11/2007 |
| 7260021 | Method of harmonic noise attenuation in correlated sweep data The present invention provides a method for harmonic noise attenuation in correlated sweep data in seismic exploration. The method includes forming a plurality of correlation data subsets using a plurality of sweep data sets and a correlation reference sequence. The... | 08/21/2007 |
| 7206798 | Apparatus and method for programmable dual stage digital filter The present invention provides a dual stage digital filter and a method for filtering digital data signals. The dual stage digital filter includes a pre-filter, a main filter, and an output register. The pre-filter receives a set of first data bits as inputs and is ... | 04/17/2007 |
| 7042935 | Equalizer and equalization method An equalizer and an equalization method capable of suppressing distortion specific to radio unit and reducing both the oversampling number and the amount of calculations without causing characteristic deterioration. The equalizer, which equalizes a received signal w... | 05/09/2006 |
| 6947876 | Method for automated system identification A method for automated system identification of a linear system is disclosed. A model structure is selected and one or more reference signal values are generated for input into the system. Input signal values and output signal values are retrieved from the system an... | 09/20/2005 |
| 6934219 | Methods and systems for acquiring seismic data Methods and systems are provided for acquiring seismic data. Data are collected representing acoustic signals received from the Earth at distinct geographic locations. Data representing an ambient signal at the distinct geographic locations are also collected. For e... | 08/23/2005 |
| 6891776 | Vibrator sweep shaping method This invention relates to improved methods to generate shaped sweeps, and for the acquisition of vibroseis data with a shaped pilot sweep. ... | 05/10/2005 |
| 6868037 | Use of drill bit energy for tomographic modeling of near surface layers A method for tomographic modeling of seismic wave travel times from well drilling records generated by drill string vibrations during drilling and identifying in the recorded vibration at least one of direct, reflected, refracted, converted and diving waves so as to... | 03/15/2005 |
| 6791900 | Method of calculating a throw volume for quantitative fault analysis A method of calculating a throw volume corresponding to a seismic data volume. A range of time shifts and a search direction for the seismic data volume are selected. A data location separation and a vertical time window are also selected. A cross-correlation is cal... | 09/14/2004 |
| 6631783 | Mapping reservoir characteristics using earth's nonlinearity as a seismic attribute This invention relates to mapping the hydrocarbon reservoir characteristics by mapping the reservoir formations that display dynamic elastic nonlinearity responses to the seismic signals. The main reason of this nonlinear behavior in the reservoir rocks i... | 10/14/2003 |
| 5426618 | Method of high resolution and high SNR data acquisition for probing using pulse-compression Excellent likeness of impulse response function ro (t) of a given linear space is obtained by exciting the space through a transmitting transducer with a compressible probing signal x(t) which is a string of lowpass narrow p(t)-wavelets polarit... | 06/20/1995 |
| 5347494 | Shaped-sweep technology A method for producing simple seismic wavelet shapes with minimal side lobe energy for use as reference signals for seismic vibrators is disclosed.... | 09/13/1994 |
| 5241513 | Correlation system for nonlinear vibratory signals Seismic data is cross correlated with a correlation reference which is an amplitude modified version of a nonlinear sweep. The amplitude modification provides both deboost and tapering.... | 08/31/1993 |
| 5111399 | Seismic apparatus and method including use of transputers for real time processing of data A seismic processing apparatus comprises a plurality of processing modules (12), each module comprising a transputer (T) and a transversal filter (TF) with these transputers of the modules connected in a linear array by their links. The apparatus is able ... | 05/05/1992 |
| 4885711 | Data processing A method for removing noise from seismic wiggle traces is provided. Data points from the seismic traces are selected for which amplitude and derivative values are determined. The derivative values are crossplotted as a function of the amplitude values. A ... | 12/05/1989 |
| 4799201 | Methods and apparatus for reducing correlation sidelobe interference in seismic profiling systems In seismic profiling systems utilizing sweeps of signals which change in repetition frequency during the transmission interval, interference results from a spurious correlation against an interfering sweep, usually produced by the first break reflection o... | 01/17/1989 |
| 4750156 | Noise suppression during seismic exploration The system for suppressing an ambient noise signal which comtaminates a desired signal includes a noise pickup detector for detecting the ambient noise signal. A noise discriminator processes the detected noise signal into noise data. A reference noise ge... | 06/07/1988 |
| 4630242 | Adaptive and non-adaptive method for estimating the earth's reflection sequence A method is disclosed for estimating the impulse response of the earth from Vibroseis data. Based on a time domain system identification approach, the earth's impulse response is estimated by operating on the seismic trace data and the vibrator pilot. Two... | 12/16/1986 |
| 4564927 | Method and apparatus for testing seismic vibrators A method of seismic exploration, wherein one or more vibratory sources are employed to generate an input signal whose frequency varies as a function of time and wherein the signal is reflected and refracted to detector stations from subsurface beds, in wh... | 01/14/1986 |
| 4397006 | Cross trace coherent noise filtering for seismograms In seismic exploration windows from a pair of contiguous traces are used in a process which determines the coherent noise on a basis trace and removes this coherent noise from a prediction trace. The operator of a digital filter is determined by autocorre... | 08/02/1983 |
| 4246652 | Seismic source signatured evaluation apparatus Apparatus is provided for determining the conformity of an energy pulse generated by a weight drop seismic source to a defined energy pulse characteristic in order that reflections associated with a non-conforming energy pulse can be rejected. The apparat... | 01/20/1981 |
| 4208732 | Apparatus and method for enhancement of the signal-to-noise ratio in seismic data In common depth point seismic exploration, seismic traces are corrected for normal moveout and stacked to form a composite trace. The composite trace is successively time shifted to provide a plurality of reference traces characterized by the normal moveo... | 06/17/1980 |
| 4206509 | Method of enhancing seismic reflection signals for nonsurface-consistent static time shifts In common depth point (CDP) seismic exploration, a pilot trace is produced from the stacked trace for each CDP set of traces. The pilot trace is crosscorrelated with each trace of the CDP set during selected time windows. The crosscorrelation time shifts ... | 06/03/1980 |
| 4188610 | Method of and apparatus for the generation and transmission of signals for echolocation and other signalling purposes, such as in geophysical exploration Methods and apparatus are described for generating and transmitting signals in accordance with a sequence which defines the time relationship of the signals. Each signal has a band width covering several octaves and may be a pulse. During a transmission i... | 02/12/1980 |
| 4168485 | Simultaneous use of pseudo-random control signals in vibrational exploration methods A method for deriving seismic information through the simultaneous operation of a plurality of vibrational seismic energy source systems such that the information produced by each source system may be separated from the combined recorded information.... | 09/18/1979 |
| 4058791 | Method and apparatus for processing seismic signals from low energy sources A system and method for carrying out seismic operations with low energy sources, which involves operating the source at spaced points along a seismic spread, the source points are spaced far enough apart so that their seismic waves originate at different ... | 11/15/1977 |
| 4044356 | Process and device for correlation for use in a doppler radar installation In a double correlation device incorporated in a radar installation for muring distance, the transmitted high-frequency signal is modulated, by frequency displacement, by a series of pseudo-random pulses. The first correlation is carried out between each... | 08/23/1977 |
