Picture engraving method and engraved picture bearing certificate
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United States of America Patent
Stats
-
May 18, 1999
Grant Date -
N/A
app pub date -
Oct 31, 1996
filing date -
May 17, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An engraved picture bearing certificate comprising a specular-surfaced engraving sheet on which an original picture for identification, such as the photograph of face, a fingerprint, a signature, a logo or the like, is engraved by a graving tool of an engraving device. The specularly reflected light from the surface of the engraving sheet is visibly recognized as the engraved picture.
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Family
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Cited Art Landscape
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