Door announcement system

Details Door announcement system Door announcement system

2008-01-09

2010-12-14

Lee, Benjamin C (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572100, C340S573200, C340S573300, C340S665000, C340S666000, C200S08500R, C200S086500, C367S197000

Reexamination Certificate

active

07852224

ABSTRACT:
A door announcement system for indicating the presence of a person or on animal outside a door includes at least one transmitting assembly sending an indicator signal when the at least one transmitting assembly is actuated. At least one receiving assembly engages an electrical outlet to provide power to the at least one receiving assembly. The at least one receiving assembly is in electrical communication with a lamp to turn the lamp on and off when the at least one receiving assembly receives the indicator signal.

REFERENCES:
patent: 3566390 (1971-02-01), Zevas et al.
patent: 3991415 (1976-11-01), Baar, Sr.
patent: 4924214 (1990-05-01), Hill
patent: D352630 (1994-11-01), Yamanaka
patent: 5604478 (1997-02-01), Grady et al.
patent: 5673022 (1997-09-01), Patel
patent: 6445302 (2002-09-01), Vena
patent: 2004/0095254 (2004-05-01), Maruszczak
patent: 2005/0252622 (2005-11-01), Reid

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