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Class Information
Number: 367/80
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Land-reflection type > Telemetry > Multiplex > Frequency
Description: Subject matter wherein signals are distinguished from one another by their frequency.

Patents under this class:

Patent Number Title Of Patent Date Issued
8238199 Wireless exploration seismic system Aug. 7, 2012
7969819 Method for taking time-synchronized seismic measurements Jun. 28, 2011
7773457 Wireless exploration seismic system Aug. 10, 2010
7733839 Dynamic socket waveform Jun. 8, 2010
7668044 Data offload and charging systems and methods Feb. 23, 2010
7573782 Seismic acquisition system Aug. 11, 2009
7263030 Seismic data acquisition system Aug. 28, 2007
7239579 Seismic data acquisition system Jul. 3, 2007
7193525 Methods and apparatus for downhole inter-tool communication Mar. 20, 2007
7193932 Seismic data acquisition system Mar. 20, 2007
7142480 Seismic data acquisition system Nov. 28, 2006
6977867 Seismic data acquisition system Dec. 20, 2005
6636816 Vector signal analysis method and apparatus therefor Oct. 21, 2003
5706250 Seismic transmission method and system utilizing concentration units Jan. 6, 1998
4497045 Seismic system with signal multiplexers Jan. 29, 1985
4058790 Method and apparatus for transmitting geophone signals over cables with minimum noise Nov. 15, 1977
4017833 Summer for group recorder Apr. 12, 1977
4010442 Status display for seismometer-group recorder operations Mar. 1, 1977
3987406 Seismic group recorder control system Oct. 19, 1976
3958216 Two-wire multiplex seismic recording system May. 18, 1976

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