US PATENT SUBCLASS 181 / 103
.~.~ Programmed or timer-controlled

Current as of: June, 1999
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181 /   HD   ACOUSTICS

101  DF  GEOPHYSICAL OR SUBSURFACE EXPLORATION {5}
102  DF  .~ Well logging {4}
103.~.~ Programmed or timer-controlled

DEFINITION

Classification: 181/103

(under subclass 102) Subject matter including means operative upon initiation to transmit or receive acoustical waves through a given cycle of operations.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, for similar subject matter not limited to a well bore.