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United States of America Patent
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-
Jul 21, 1987
Issued Date -
N/A
app pub date -
Nov 12, 1986
filing date -
Jun 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An illuminated exit sign having a plurality of series connected light emitting diodes arranged to form the word 'exit' and a control circuit for supplying power to the series connected diodes from line power and, during power failures, from battery power. The control circuit illuminates the diodes continuously during normal operation and alternately switches the diodes on and off during a power failure.
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Cited Art Landscape
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