US PATENT SUBCLASS 379 / 179
.~ Call alerting (e.g., ringing)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

177  DF  POLYSTATION LINE SYSTEM (I.E., PARTY LINE) {6}
179.~ Call alerting (e.g., ringing) {2}
180  DF  .~.~> Full selective or tuned (e.g., harmonic)
181  DF  .~.~> Semi-selective (e.g., line side, polarized)

DEFINITION

Classification: 379/179

Call alerting (e.g., ringing):

(under subclass 177) Subject matter which directs a call alerting signal to a party line subscriber terminal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

252+, for call alerting.