US PATENT SUBCLASS 455 / 567
.~.~ Call alerting

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}
567.~.~ Call alerting

DEFINITION

Classification: 455/567

Call alerting:

(under subclass 550) Subject matter having indication of an incoming call signal (e.g., ringing).

SEE OR SEARCH CLASS

379, Telephonic Communications,

418, for call signal generating in a landline telephone substation.