US PATENT SUBCLASS 181 / 113
.~ Seismic wave generation

Current as of: June, 1999
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181 /   HD   ACOUSTICS

101  DF  GEOPHYSICAL OR SUBSURFACE EXPLORATION {5}
113.~ Seismic wave generation {5}
114  DF  .~.~> Vehicle-mounted
115  DF  .~.~> Bubble suppression or control
116  DF  .~.~> Explosive {1}
119  DF  .~.~> Fluid means {1}
121  DF  .~.~> Moving weight

DEFINITION

Classification: 181/113

(under subclass 101) Subject matter wherein the system includes means for producing seismic waves.

SEE OR SEARCH CLASS

116, Signals and Indicators, appropriate subclasses, for mechanical signalling devices utilizing sound.