Electric lamp and discharge devices: systems – Automatic substitution of the power supply
Reexamination Certificate
2007-05-15
2007-05-15
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Automatic substitution of the power supply
C315S307000, C307S066000, C340S693200
Reexamination Certificate
active
11374545
ABSTRACT:
Lighting device having a number of light sources for illumination an area around the lighting device. The lighting device including capabilities for generating illumination when a primary power source is unavailable. The light device may include a secondary power source for use in powering the lighting device when the primary power source is unavailable. The lighting device may include multiple operating modes, optionally depending on the active power source.
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