US PATENT SUBCLASS 370 / 488
.~.~.~ Connecting filters

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

464  DF  COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9}
480  DF  .~ Combining or distributing information via frequency channels {11}
485  DF  .~.~ Subscriber carrier {2}
488.~.~.~ Connecting filters

DEFINITION

Classification: 370/488

Connecting filters:

(under subclass 485) Subject matter in which a arrangement of filters or filtering techniques are employed for signal combination or separation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

484, for digital filtering used in a carrier system.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks,

100+, and 165 through 167 for coupling networks utilized in a manner similar to networks classified here.