Internally illuminated retroreflective sign
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Mar 18, 1988
filing date -
Mar 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An internally illuminated sign employs retroreflective sheeting with optically transmissive bonds between cover layer and base layer, thereby making the sign suitable for applications where visibility of the sign is required if the internal illumination source fails. A light conduit may be employed to allow the source of internal illumination to be remote from the interior of the sign enclosure. Total internal reflection type sheeting also may be employed to diffuse the internal illumination.
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Family
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Cited Art Landscape
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