US PATENT SUBCLASS 702 / 197
.~.~.~.~ Having multiple filtering stages

Current as of: June, 1999
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702 /   HD   DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING

127  DF  MEASUREMENT SYSTEM {15}
189  DF  .~ Measured signal processing {3}
190  DF  .~.~ Signal extraction or separation (e.g., filtering) {2}
196  DF  .~.~.~ Using matrix operation {1}
197.~.~.~.~ Having multiple filtering stages

DEFINITION

Classification: 702/197

Having multiple filtering stages:

(under subclass 196) Subject matter including a cascaded filtering means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

17, for filtering or noise reduction in a seismic prospecting system.

69, for a system to measure signal quality in a waveform.

70, for waveform extraction.

107, for circuit tuning.