Emergency sign power supply with battery charger

Details Emergency sign power supply with battery charger Emergency sign power supply with battery charger

2008-12-03

2011-12-13

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Plural series connected load devices

Christmas lights

C315S129000, C315S131000, C315S291000, C315S324000

Reexamination Certificate

active

08076859

ABSTRACT:
An emergency sign power supply with battery charger is provided. In some embodiments the battery charging circuit is formed by a single diode and a single resistor.

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patent: 5847550 (1998-12-01), Schie
patent: 6141234 (2000-10-01), Knoble
patent: 6294983 (2001-09-01), Lee
patent: 6663248 (2003-12-01), Hsieh
patent: 2002/0191396 (2002-12-01), Reiff

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