US PATENT SUBCLASS 379 / 50
.~ By pulse or digital signal

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

37  DF  EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT) {9}
50.~ By pulse or digital signal

DEFINITION

Classification: 379/50

By pulse or digital signal:

(under subclass 37) Subject matter wherein the alarm signal is transmitted over a telephone line as a pulse or a digital signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93.01+, transmission of a digital message signal over a telephone line.

SEE OR SEARCH CLASS

375, Pulse or Digital Communications, appropriate subclasses for nontelephone digital communication.