US PATENT SUBCLASS 367 / 42
.~.~.~ Standard correlation

Current as of: June, 1999
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367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

14  DF  SEISMIC PROSPECTING {4}
37  DF  .~ Land-reflection type {6}
38  DF  .~.~ Signal analysis and/or correction {15}
42.~.~.~ Standard correlation

DEFINITION

Classification: 367/42

Standard correlation:

(under subclass 38) Subject matter wherein the information or intelligence is identified by comparing the signal representative of the detected wave with another signal of known shape.

(1) Note. The signal of known shape may also drive the acoustic wave transmitter, the waves from which, reflected by discontinuities, becoming the detected waves of the subject matter of this subclass. The signal of known shape of this subclass type differ from "signal representative of the emitted wave" of the preceding subclass in that the signals driving the transmitter are not necessarily the same as signals representative of the wave actually emitted by the transmitter.