US PATENT SUBCLASS 455 / 528
.~.~ Lockout or busy-idle signaling

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

39  DF  TRANSMITTER AND RECEIVER AT SEPARATE STATIONS {14}
500  DF  .~ Plural transmitters or receivers (i.e., more than two stations) {4}
528.~.~ Lockout or busy-idle signaling

DEFINITION

Classification: 455/528

Lockout or busy-idle signaling:

(under subclass 500) Subject matter wherein a transmitting operator may prevent other transmitters in the system from operating or may generate a signal indicating the status of the transmitting channel.

SEE OR SEARCH CLASS

340, Communications: Electrical,

825.5+, for selective systems including lockout authority.