US PATENT SUBCLASS 379 / 47
.~ Plural alarms over single line

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379 /   HD   TELEPHONIC COMMUNICATIONS

37  DF  EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT) {9}
47.~ Plural alarms over single line

DEFINITION

Classification: 379/47

Plural alarms over single line:

(under subclass 37) Subject matter wherein a plurality of alert signals are sent over one telephone line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42, for a condition responsive plural alarm signals.