US PATENT SUBCLASS 181 / 108
.~ Seismic source and detector

Current as of: June, 1999
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181 /   HD   ACOUSTICS

101  DF  GEOPHYSICAL OR SUBSURFACE EXPLORATION {5}
108.~ Seismic source and detector {4}
109  DF  .~.~> Aerial
110  DF  .~.~> Underwater
111  DF  .~.~> Plural sources
112  DF  .~.~> Plural detectors

DEFINITION

Classification: 181/108

(under subclass 101) Subject matter including means for transmitting and receiving seismic waves.