Cellular telephone alarm

Details Cellular telephone alarm Cellular telephone alarm

1997-05-21

2000-01-04

Chin, Wellington

Telecommunications

Radiotelephone system

Emergency or alarm communication

455422, 455564, 455575, H04Q 720

Patent

active

060119675

ABSTRACT:
Cellular telephone which operates as an alarm in an alarm mode. After or prior to being manually or automatically set in the alarm mode, the cellular telephone receives a sensor signal which identifies the occurrence or non-occurrence of a predetermined event. Upon receiving a signal that indicates the occurrence of a predetermined, usually undesirable, event, the cellular telephone automatically establishes a channel of communication with a pre-programmed telephone number, transmits to the called number identification data that identifies the cellular telephone, and then establishes the cellular telephone in a particular alarm operating mode, for example, a two-way audio mode.

REFERENCES:
patent: 5144661 (1992-09-01), Shamosh et al.
patent: 5218367 (1993-06-01), Sheffer et al.
patent: 5319698 (1994-06-01), Glidewell et al.
patent: 5412708 (1995-05-01), Katz
patent: 5517683 (1996-05-01), Collett et al.
patent: 5568535 (1996-10-01), Sheffer et al.
patent: 5742233 (1998-04-01), Hoffman et al.

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