US PATENT SUBCLASS 455 / 306
.~.~.~.~ Filter in at least one path

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
296  DF  .~ Noise or interference elimination {10}
303  DF  .~.~ Using plural separate signal paths {2}
305  DF  .~.~.~ With balancing or neutralizing {1}
306.~.~.~.~ Filter in at least one path

DEFINITION

Classification: 455/306

Filter in at least one path:

(under subclass 305) Subject matter where at least one signal path offers comparatively little opposition to certain frequencies or to direct current, while blocking or attenuating other frequencies.