Embedded electronic security system

Details Embedded electronic security system Embedded electronic security system

2006-06-13

2006-06-13

Phan, Dao L. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07061426

ABSTRACT:
A user-portable device determines its own geolocation, and compares that location with a region defined by at least one memorized specified location and a distance. A deviation or alarm signal is generated when either within or without the defined region. In one version, the memorized specified location is the geolocation of another, remote user-portable device.

REFERENCES:
patent: 5532690 (1996-07-01), Hertel
patent: 5936526 (1999-08-01), Klein
patent: 5961571 (1999-10-01), Gorr et al.
patent: 6154658 (2000-11-01), Caci
patent: 6166688 (2000-12-01), Cromer et al.

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