US PATENT SUBCLASS 455 / 565
.~.~ Restrictive dialing circuitry

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

73  DF  TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) {9}
550  DF  .~ Radiotelephone equipment detail {17}
565.~.~ Restrictive dialing circuitry

DEFINITION

Classification: 455/565

Restrictive dialing circuitry:

(under subclass 550) Subject matter having circuitry to disable or confine the output of a call address signal.

SEE OR SEARCH CLASS

379, Telephonic Communications,

200, for restrictive dialing circuitry in a landline telephone substation.