US PATENT SUBCLASS 455 / 500
.~ Plural transmitters or receivers (i.e., more than two stations)

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

39  DF  TRANSMITTER AND RECEIVER AT SEPARATE STATIONS {14}
500.~ Plural transmitters or receivers (i.e., more than two stations) {4}
501  DF  .~.~> Noise, distortion, or singing reduction {2}
507  DF  .~.~> Central station (e.g., master, etc.) {6}
527  DF  .~.~> Break-in or priority override
528  DF  .~.~> Lockout or busy-idle signaling

DEFINITION

Classification: 455/500

Plural transmitters or receivers (i.e., more than two stations):

(under subclass 39) Subject matter including a plurality of separate and distinct transmitters, or receivers, or transmitter-receiver assemblies, which are physically located at a distance from each other and not restricted by claimed subject matter to other art classes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7+, for a repeater which may employ plural transmitters or receivers.

403+, for a radiotelephone system wherein the intelligence to be conveyed is voice and which includes significant telephone exchange or landline structure.

SEE OR SEARCH CLASS

340, Communications: Electrical,

825+, and 870.11+ for electrical communications in general which may have more than one transmitter or receiver.