Battery backup electric plug with female plug

Details Battery backup electric plug with female plug Battery backup electric plug with female plug

2006-07-06

2008-05-27

Paumen, Gary F. (Department: 2833)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

C307S080000, C307S140000, C307S150000, C439S490000, C439S651000

Reexamination Certificate

active

07378756

ABSTRACT:
A plug which is attached to a power cord of an appliance, such as a clock or an appliance having an internal clock, includes a battery that will supply power to the appliance during a failure of utility power whereby the clock associated with the plug need not be reset after restoration of power. The plug is interposed between the plug of the appliance associated therewith and the source of utility power.

REFERENCES:
patent: 4749908 (1988-06-01), Stifter
patent: 5138185 (1992-08-01), Weinstock
patent: D336144 (1993-06-01), Galati
patent: 5616968 (1997-04-01), Fujii et al.
patent: 5825648 (1998-10-01), Karnowski
patent: 5874788 (1999-02-01), McCartney
patent: 6274949 (2001-08-01), Lioux et al.
patent: 6288455 (2001-09-01), Fujita
patent: 6380852 (2002-04-01), Hartman et al.
patent: 6532195 (2003-03-01), Head

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