System for surveillance of and communication with...

Details System for surveillance of and communication with... System for surveillance of and communication with...

2006-03-14

2006-03-14

Trieu, Van T. (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S545300, C340S545700

Reexamination Certificate

active

07012523

ABSTRACT:
A surveillance system for the entryway of a residence utilizes an existing peephole in a door to install a camera and utilizes the existing telephones in a residence to communicate from within the residence with an individual standing in the entryway.

REFERENCES:
patent: 4524384 (1985-06-01), Lefkowitz et al.
patent: 4843461 (1989-06-01), Tatsumi et al.
patent: 5428388 (1995-06-01), von Bauer et al.
patent: 5726430 (1998-03-01), Ruggirello
patent: 6411694 (2002-06-01), Steller
patent: 6429893 (2002-08-01), Xin

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