Alternating sign
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United States of America Patent
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Aug 21, 2012
Grant Date -
May 6, 2010
app pub date -
Mar 17, 2008
filing date -
Mar 15, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An alternating sign assembly includes a sheet of light permeable material comprising a front surface and a rear surface; a front design that includes a front design layer; a silhouette pattern including light-restricting imaging material, said front design being superimposed on or forming a part of the silhouette pattern, said silhouette pattern subdividing said sheet into a plurality of discrete areas of said imaging material and/or a plurality of discrete areas devoid of said imaging material; a switchable front source of artificial illumination of said front design; a rear design disposed rearwardly of the front design; and a switchable rear source of artificial illumination of said rear design. The sources of illumination may be alternately turned on to make the front and rear designs alternately visible to an observer in front of the assembly.
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