US PATENT SUBCLASS 379 / 37
EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT)

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

37EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT) {9}
38  DF  .~> Personal monitoring (e.g., for the ill or infirm)
39  DF  .~> Responsive to sensed nonsystem condition {5}
45  DF  .~> Central office responsive to emergency call or alarm (e.g., "911", operator position display)
46  DF  .~> Called line or station condition responsive (e.g., recall if busy)
47  DF  .~> Plural alarms over single line
48  DF  .~> Announcement or alarm received at terminal station (e.g., "butt-in", alarm)
49  DF  .~> Central station with plural substations
50  DF  .~> By pulse or digital signal
51  DF  .~> With automatic dialing or transmission of recorded audio message

DEFINITION

Classification: 379/37

EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT):

(under the class definition) Subject matter for summoning response to a hazardous situation over a telephone line.

(1) Note. The term "hazardous situation" refers to a condition or occurrence posing imminent danger to life, health, or property.

(2) Note. The subject matter in this and it's indented subclasses included both systems solely for emergency use an details of adjunct to other systems to specifically provide for emergency situations. Further, an arrangement incidentally (e.g., an automatic dialer) be used for an emergency situation will be classified with such arrangement.

SEE OR SEARCH CLASS

340, Communications: Electrical,

287+, for a signal box alarm arrangement, particularly subclass 288 for alarm transmission over a power line.