US PATENT SUBCLASS 379 / 44
.~.~ Intrusion

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}
39  DF  .~ Responsive to sensed nonsystem condition {5}
44.~.~ Intrusion

DEFINITION

Classification: 379/44

Intrusion:

(under subclass 39) Subject matter wherein the detected condition is the entry of a living being into a given space.

SEE OR SEARCH CLASS

340, Communications: Electrical,

541+, for an intrusion alarm not limited to telephone equipment.