US PATENT SUBCLASS 324 / 76.44
.~.~.~ With filtering

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

76.11  DF  MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46}
76.39  DF  .~ Frequency of cyclic current or voltage (e.g., cyclic counting etc.) {6}
76.41  DF  .~.~ Frequency comparison, (e.g., heterodyne, etc.) {4}
76.44.~.~.~ With filtering {2}
76.45  DF  .~.~.~.~> Bandpass
76.46  DF  .~.~.~.~> Plural

DEFINITION

Classification: 324/76.44

With filtering:

(under subclass 76.41) Subject matter including a selective network of resistors, inductors, or capacitors which offers comparatively little opposition to certain frequencies, while blocking or attenuating other frequencies.

SEE OR SEARCH THIS CLASS, SUBCLASS:

76.28, for digital filters in frequency spectrum analysis.

76.29+, for filtering in frequency spectrum analyzer.

76.31, for parallel filters in frequency spectrum analysis.

76.68, for filtering in phase comparison used to determine the frequency of cyclic current or voltage.