US PATENT SUBCLASS 370 / 480
.~ Combining or distributing information via frequency channels

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.~ Combining or distributing information via frequency channels {11}
481  DF  .~.~> Multiple frequency translations
482  DF  .~.~> Particular carrier generation
483  DF  .~.~> Using angle modulation
484  DF  .~.~> Digital analysis or synthesis of a group
485  DF  .~.~> Subscriber carrier {2}
489  DF  .~.~> Bus (distributed stations) {1}
491  DF  .~.~> Pilot
492  DF  .~.~> Repeater
493  DF  .~.~> Combined voice and data transmission {2}
496  DF  .~.~> Signaling
497  DF  .~.~> Using particular filtering technique

DEFINITION

Classification: 370/480

Combining or distributing information via frequency channels:

(under subclass 464) Subject matter wherein information signals are communicated between stations by assembling or separating the signals via different frequency bands on a common transmission medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

281, and 295, for a frequency division duplex system.

302, for a low speed asynchronous system using frequency channels.

343, for multiplex communication over free space via frequency channels