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Class Information
Number: 367/67
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Land-reflection type > Signal analysis and/or correction > Gain control > Digital
Description: Subject matter wherein the signal is in the form of discrete pulses.

Patents under this class:

Patent Number Title Of Patent Date Issued
5563847 Seismic signal acquisition method and device Oct. 8, 1996
5113192 Method for using seismic data acquisition technology for acquisition of ground penetrating radar data May. 12, 1992
4999817 Programmable gain control for rotating transducer ultrasonic tools Mar. 12, 1991
4813026 Method for logarithmic analysis of seismic reflection signals Mar. 14, 1989
4779055 Device for amplifying and sampling high dynamic signals Oct. 18, 1988
4727521 Seismic amplifier means and method Feb. 23, 1988
4725950 Marine seismic signal processor with D.C. offset compensation method Feb. 16, 1988
4679162 Wide dynamic range linear to log converter with microcomputer control Jul. 7, 1987
4646275 Dynamic range compression for variable area or wiggle trace display method and apparatus Feb. 24, 1987
4535299 Compound floating point amplifier Aug. 13, 1985
4527148 Analog-digital converter Jul. 2, 1985
4449120 Method for amplifying multiplexed signals through different gain amplification units for selecting an optimum gain signal and device therefore May. 15, 1984
4412207 Digital induction logging tool including a floating point A/D Oct. 25, 1983
4393369 Floating-point A/D and D/A converter Jul. 12, 1983
4383247 Gain-step companding analog to digital converter May. 10, 1983
4378527 Device for amplifying and sampling analog signals Mar. 29, 1983
4218765 Two-dimensional frequency domain filtering Aug. 19, 1980
4110723 Ultrasonic apparatus for medical diagnosis Aug. 29, 1978
4084151 System for recording and processing seismic reflection signals Apr. 11, 1978
4066992 Seismic mine monitoring system Jan. 3, 1978
4064480 Means and method for recording seismic signals Dec. 20, 1977
4048635 Seismic playback/monitor system Sep. 13, 1977
4042906 Automatic data acquisition method and system Aug. 16, 1977
4042907 Apparatus for preventing cycle skipping in processing acoustic well-logging signals Aug. 16, 1977
4042905 Data acquisition, transport and storage system Aug. 16, 1977
4031505 Seismic system with signal-to-noise determination Jun. 21, 1977
4031504 Gain ranging amplifier system Jun. 21, 1977
4031506 Multiplexer commutated high pass filter Jun. 21, 1977
4027281 Digital recording of sonic log wavetrains May. 31, 1977
4024492 Seismic array May. 17, 1977
4021772 System for recording seismic reflection signals in true amplitude May. 3, 1977
4017833 Summer for group recorder Apr. 12, 1977
4016557 Automatic gain controlled amplifier apparatus Apr. 5, 1977
4010462 Seismic playback system Mar. 1, 1977
4004268 In-line stress/strain detector Jan. 18, 1977
3990036 Multiplexing method and apparatus for telemetry of seismic data Nov. 2, 1976
3958213 Adaptive gain control and method for signal processor May. 18, 1976
3947806 Automatic gain control for seismometer recorders Mar. 30, 1976
3944942 Automatic gain control circuit and method Mar. 16, 1976

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