US PATENT SUBCLASS 333 / 188
.~.~.~ With means for varying response

Current as of: June, 1999
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333 /   HD   WAVE TRANSMISSION LINES AND NETWORKS

24 R  DF  COUPLING NETWORKS {15}
186  DF  .~ Electromechanical filter {5}
187  DF  .~.~ Using bulk mode piezoelectric vibrator {2}
188.~.~.~ With means for varying response

DEFINITION

Classification: 333/188

With means for varying response:

(under subclass 187) Subject matter wherein the filter bandwidth, center frequency, or phasing may be adjusted by mechanically or electrically variable parameters.